MOHAMED USHMAN MDSN INDIA

MDSN Software

MDSN Welcome 1.1

The MDSN Welcome 1.1 software will welcome you when system start up.

MDSN DC 1.0

The MDSN DC 1.0 makes snowfall on windows desktop.

Windows tweaks tips and tricks

How to register or unregister OCX and DLL file using administrator cmd , context menu.

Register or Install , unregister or Uninstall OCX and DLL in Windows.
Register or Unregister OCX and DLL using administrator cmd in Windows.
Register or Unregister OCX and DLL using context menu in Windows.

How to open files (exe, txt, etc., ) and folder from My Computer, Control Panel, Context menu.

How to create a CLSID in Windows.
Open files (exe, txt, etc., ) and folders from My Computer Control Panel,Context menu right click in Windows.

How to create own name File and Folder.

How to create own name File and Folder using context menu right click in Windows.
Editing context menu new menu items in Windows.

How to Run Command Prompt as an Administrator

In this topic you will learn how to open a command prompt with full administrator permissions. There are Four easy methods to run command prompt as administrator such as Start Menu, Folder file menu , Quick Access Toolbar and from context menu. This method works on windows 8 and 8.1. The context menu method is also works on windows 7.

1.Run from Start Menu.

Click Start.
In the Start Search box, type cmd
Right-click Command prompt, and then click Run as administrator.
In the User Account Control dialog click yes to Continue.

&nbsp &nbsp &nbsp[>>> OR <<<]

Click Start.
In the Start Search box, type cmd, and then press "Ctrl+Shift+Enter".
In the User Account Control dialog click yes to Continue.

2.Run from any Folder.

Open Folder.
Click File menu and then navigate to Open command prompt.
In "Open command prompt" you find two way normal method and admin method.
Click " Open command prompt as administrator" to open.

3.Run form Quick Access Toolbar.

Open Folder.
Click File menu and then navigate to Open command prompt.
In "Open command prompt&auot; you find two way normal method and admin method.
Right Click on "Open command prompt as administrator" after that click "Add to Quick Access Toolbar".
Now you can open admin cmd easily form Quick access toolbar.

4.Run form Context Menu.

Install Registry key in your system to run command prompt as administrator from context menu.


Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Directory\background\shell\runas]
"icon"="imageres.dll,73"
@="Run CMD as administrator"

[HKEY_CLASSES_ROOT\Directory\background\shell\runas\command]
@="cmd.exe /s /k \"pushd %V && title Command Prompt\""

Download Run CMD as administrator.zip

Video

Categories: Windows

Escape Sequences in C

Escape sequence are useful for formatting the Input and Output. All Escape sequences are start from Back slash " \" followed by a character. The " \n " new line is most commonly used in printing statement.

Escape Sequence with ASCII Value

Character	Escape Sequences	ASCII Value
Null	\0	0
Bell (alert)	\a	7
Backspase	\b	8
Horizontal tab	\t	9
New line	\n	10
Vertical tab	\v	11
Formfeed	\f	12
Carriage return	\r	13
Double quote	\"	34
Single quote	\'	39
Question mark	\?	63
Backslash	\\	92
Octal number	\ooo	any
Hexadecimal number	\xhh	any

Octal Number:
Example: \7, \007, \786
Hexadecimal Number:
Example: \x5, \x57, \x7f

Program to display ASCII value

#include <stdio.h>
int main(){
printf("Null=%d\n",'\0');
printf("Bell (alert)=%d\n",'\a');
printf("Backspase=%d\n",'\b');
printf("Horizontal tab=%d\n",'\t');
printf("New line=%d\n",'\n');
printf("Vertical tab=%d\n",'\v');
printf("Formfeed=%d\n",'\f');
printf("Carriage return=%d\n",'\r');
printf("Double quote=%d\n",'\"');
printf("Single quote=%d\n",'\'');
printf("Question mark=%d\n",'\?');
printf("Backslash=%d\n",'\\');
return 0;
}

Output

Null=0
Bell (alert)=7
Backspase=8
Horizontal tab=9
New line=10
Vertical tab=11
Formfeed=12
Carriage return=13
Double quote=34
Single quote=39
Question mark=63
Backslash=92

Example program to print Escape sequences and percentage symbol.

#include <stdio.h>
int main(){
printf("\aC Program\n");
printf("New line =\\n\n");
printf("Percentage symbol=%%");
return 0;
}

Categories: Learn C

Operator Precedence in c

When two or more operators share an operand the operator with the higher precedence goes first. For an example, 1 + 2 * 3 is treated as 1 + (2 * 3), because multiplication has a higher precedence than addition.

Operator Precedence and Associativity

Priority	Category	Operator	What is it (or does)	Associativity
1	Highest	( ) [ ] -> .	Function call Array subscript Indirect component selector Direct component selector	Left to Right
2	Unary	! ~ + - ++ -- & * sizeof (type)	Logical negation (NOT) Bitwise (1's) complement Unary plus Unary minus Preincrement or postincrement Predecrement or postdecrement Address Indirection Size of operand, in bytes TypeCast	Right to Left
3	Multiplicative	* / %	Multiply Divide Remainder (modulus)	Left to Right
4	Aditive	+ -	Binary plus Binary minus	Left to Right
5	Shift	<< >>	Shift left Shift right	Left to Right
6	Relational	< <= > >=	Less than Less than or equal to Greater than Greater than or equal to	Left to Right
7	Equality	== !=	Equal to Not equal to	Left to Right
8	Bitwise AND	&	Bitwise AND	Left to Right
9	Bitwise XOR	^	Bitwise XOR	Left to Right
10	Bitwise OR	\|	Bitwise OR	Left to Right
11	Logical AND	&&	Logical AND	Left to Right
12	Logical OR	\|\|	Logical OR	Left to Right
13	Conditional	?:	"a ? x : y" means "if a then x, else y"	Right to Left
14	Assignment	= *= /= %= += -= &= ^= \|= <<= >>=	Simple assignment Assign product Assign quotient Assign remainder (modulus) Assign sum Assign difference Assign bitwise AND Assign bitwise XOR Assign bitwise OR Assign left shift Assign right shift	Right to Left
15	Comma	,	Evaluate	Left to Right

Example for Operatro precedence

#include <stdio.h>
int main(){
float a=1,b=2,c=3,d;
d=a+b*c;
printf("a+b*c=%f\n",d);

d=(a+b)*c;
printf("(a+b)*c=%f",a);
return 0;
}

Output

a+b*c=7.000000
(a+b)*c=1.000000

Categories: Learn C

Punctuator in C

A punctuator is also a token and it also defined in compiler like keywords. A punctuator can also be a token that is used in the syntax of the preprocessor. some Operator or punctuator alternative representations for some operators and punctuators.

Punctuator

Operator	Meanning
[ ]	Array subscript Operator
( )	Parentheses Operator
{ }	Braces
=	Equal sign
,	Comma Operator (or) Punctuator
:	Colon
;	Semicolon
*	Astrisk
" "	Quotes
' '	Ellipsis

C and C++ ( C99 ) provide the following alternative representations for some operators and punctuators.

Operator or punctuator	Alternative Representation
#	%:
##	%:%:
{	<%
}	%>
[	<:
]	:>

Example for using Alternative representation.

// Alternative Representation Example
%:include<stdio.h>
int main()
<%  //  Open Brace {.
char a<:5:>="MDSN";  // Array subscript operator Ex: a[5]="MDSN"
printf("%s",a);  // Output MDSN
return 0;
%>  // Close Brace {.

Some more alternative representation defined as macros in the header file " iso646.h".

Operator or punctuator	Alternative Representation
&	bitand
&&	and
&=	and_eq
\|	bitor
\|\|	or
\|=	or_eq
^	xor
^=	xor_eq
!	not
!=	not_eq
~	compl

Example:

  %:include<stdio.h> //  # preprocessor 
  %:include<iso646.h>
  int main()
  <%  //  Open Brace {.
  int a=5,b=5,c=2;
  if((a==5)and(a==b)) //if((a==5)&&(a==b))
  {printf("a=5 and a=b\n");}
  
  if(a not_eq c) //if(a != c)
  {printf("a is not equal to c\n");}
  return 0;
  %>  // Close Brace {.

Categories: Learn C

Unary Operators in C

Unary Operators are written before their single operand some Unary Operators written after their operands. Most commonly unary minus is used in the program.

Unary Operator

Operator	Meaning
&	Referencing Operator
*	Dereferencing Operator
+	Unary PlusOperator
-	Unary Minus Operator
++	Increment Operator
--	Decrement Operator
!	Logical Not Operator
~	Bitwise Complement Operator
sizeof	Size of operand in bytes
(type)	Type Cast

Referencing operator ('&')

Referencing operator ( & ) produces the address of a variable, Ex: &a is a pointer to a. the
parameters are declared as pointers, and the operands are accessed indirectly through them.

Dereferencing Operator ('*')

The unary operator "*" is Dereferencing Operator and it applied to a pointer, it
accesses the object the pointer variable. Ex: *a.

Unary ( +, - ) Operator

The operands of the unary "+" and "-"operator must have arithmetic type, and the result is the value of the operand. The type of the result is the type of the promoted operand.

Increment Operator (++) & Decrement Operator (--)

The "++" adds one to the variables and "--" subtracts one from the variable. Because it acts upon only one variable.

Operator	Meaning
++a	Pre increment
a++	Post increment
--a	Pre decrement
a--	Post decrement

Consider the statement
a=5, b=5

Expression	Value
++a	6
a++	6
--b	4
b--	4

Coding for the above Example:

#include<stdio.h>
  int main()
  {
  int a=5,b=5;
  printf("Value of a=%d\n",a);
  printf("Pre increment %d\n",++a);
  printf("After pre increment the value of a=%d\n",a);
  printf("Post increment %d\n",a++);
  printf("After post increment the value of a=%d\n\n",a);
printf("Value of b=%d\n",b);
  printf("Pre decrement %d\n",--b);
  printf("After pre decrement the value of a=%d\n",b);
  printf("Post decrement %d\n",b--);
  printf("After post decrement the value of a=%d\n",b--);
return 0;
  }

Output

Value of a=5
Pre increment 6
After pre increment the value of a=6
Post increment 6
After post increment the value of a=7

Value of b=5
Pre decrement 4
After pre decrement the value of a=4
Post decrement 4
After post decrement the value of a=3

Logical Not Operator

The variable(operand) must be of scalar type (i.e. not an array, a structure or an union).
Consider the statement
a=5,b=7,c=5

Expression	Interpretation	Value
!(a==c)	False	0
!(a==b)	True	1

Bitwise Complement Operator

operand must be of integral type. Each 0 bit in the operand is set to 1, and each 1 bit in the operand is set to 0.
Consider the statement
X=19;
Z=~x;
X=0001 0011₂
Z=1110 1100₂

Sizeof Operator

The "sizeof" Operator returns the size of the variable or type. It returns the size in bytes.

#include<stdio.h>
int main()
{
int m;
printf("%d",sizeof(int));
printf("\n%d",sizeof(m));
return 0;
}

Type Cast

Type casting is a way of converting a variable form one data to another data type. For an example if you want to store a integer value into a float then you can type cast int to float.

#include<stdio.h>
int main()
{
int a=5,b=3;
float c;
c=(float) a/b;
printf("a/b=%f",c);
return 0;
}

Categories: Learn C

Logical Operators in C

Logical Operators are useful in combining one or more conditions. C allows usage of three logical operators namely " &&, ||, ! ".

Logical Operators

Operator	Meaning
&&	Logical AND
\|\|	Logical OR
!	Logical NOT

Truth Table of Logical Operator

In the following table
if True(T) means value is one.
If False(F) means valuse is Zero.

X	Y	!X	!Y	X && Y	X \|\| Y
F	F	T	T	F	F
F	T	T	F	F	T
T	F	F	T	F	T
T	T	F	F	T	T

Consider the statement
a=5,b=7;c=5;

Expression	Interpretation	Value
(a>=5)&&(a<b)	True	1
!(a==c)	False	0
(a!=5)\|\|(b>c)	True	1
!(a==b)	True	1

Codings for the above Example:

#include<stdio.h>
  int main()
  {
  int a=5,b=7,c=5;
  
  if((a>=5)&&(a<b)){printf("\"(a>=5)&&(a<b)\" = True\n");}
  else{printf("\"(a>=5)&&(a<b)\" = False\n");}
  
  if(!(a==c)){printf("\"!(a==b) or a is not equal to c\" = True\n");}
  else{printf("\"!(a==b) or a is not equal to c\" = False\n");}
  
  if((a!=5)||(b>c)){printf("\"(a!=5)||(b>c)\" = True\n");}
  else{printf("\"(a!=5)||(b>c)\" = False\n");}
  
  if(!(a==b)){printf("\"!(a==b) or a is not equal to b\" = True\n");}
  else{printf("\"!(a==b) or a is not equal to b\" = False\n");}
  
  return 0;
  }

Categories: Learn C

Relational operator in C

The relational operators allows to compare two or more values to see whether they are equal or unequal.

Relational operator

Operator	Meanning
<	Is less than
<=	Is less then or equal to
>	Is greater then
>=	Is greater then or equal to
!=	Is not equal to
==	Is equal to

Consider the statement
a=1,b=2,c=3;

Expression	Interpretation	Value
a<b	True	1
b>c	False	0
a<=b	True	1
c>=b	True	1
c!=3	False	0
a==1	True	1

Codings for the above Example:

#include<stdio.h>
  int main()
  {
  int a=1,b=2,c=3;
if(a<b)
  {printf("a is less then b  ,value= 1 \n");}
  else{printf("a is not less then b  ,value=0 \n");}
if(b>c)
  {printf("b is greater then c  ,value=1 \n");}
  else{printf("b is not greater then c  ,value=0 \n");}
if(a<=b)
  {printf("a is less then or equal to b  ,value=1 \n");}
  else{printf("a is not less then or equal to b  ,value=0 \n");}
if(c>b)
  {printf("c is greater then or equal to b  ,value=1 \n");}
  else{printf("c is not greater then or equal to b  ,value=0 \n");}
if(c!=3)
  {printf("c is not equal to 3  ,value=1 \n");}
  else{printf("c is equal to 3  ,value=0 \n");}
if(a==1)
  {printf("a is equal to 1  ,value=1 \n");}
  else{printf("a is not equal to 1  ,value=0 \n");}
  return 0;
  }

Output

a is less then b ,value= 1
b is not greater then c ,value=0
a is less then or equal to b ,value=1
c is greater then or equal to b ,value=1
c is equal to 3 ,value=0
a is equal to 1 ,value=1

Categories: Learn C

Conditional Operator in C

Conditional Operator is also known as Turnary Operator. It is an alternate method to using a simple if-else. It checks the condition and executes the statement depending on the condition.

Syntex

condition?expression1:expression2;

if condition is True or value 1 means expression1 will execute.
if condition is False or value 0 means expression2 will execute.
Example:
Consider the statement
a=7,b=5
c=(a>b) ? a:b;
after execution the value of c=7
Example 1:

#include<stdio.h>
int main()
{
int a=7,b=5,c;
c=(0) ? a:b;   // c=5
printf("c=%d\n",c);
c=(1) ? a:b;   // c=7
printf("c=%d\n",c);
return 0;
}

Example 2:

#include<stdio.h>
int main()
{
int a=7,b=5,c;
c=(a>b) ? a:b;
printf("c=%d",c);
return 0;
}

Example :3

// Conditional operator using multiple function
  #include<stdio.h>
  int comp();
  int prin1();
  int prin2();
  int main()
  {
  comp()?prin1():prin2();//multiple function using Turnary Operator
return 0;
  }
 /* Comparing the values in comp()[function]
  int comp()
  {
  int a=7,b=5;
  if(a<b)
  {return 0;}
  if(a>b)
  {return 1;}
  }
 
int prin1() // printing function 1
  {
  printf("A is bigger\n");
  return 0;
  }
  
int prin2() // printing function 2
  {
  printf("B is bigger\n");
  return 0;
  }

Categories: Learn C

Bitwise operator in C

Bitwise operator permit the programmer to access and manipulate individual bits within a piece of data. These operators can operate upon ints and chars but not on floats and doubles.

Bitwise operators

Operator	Meaning
&	Bitwise AND
\|	Bitwise OR
^	Bitwise XOR
<<	Shift Left
>>	Shift Right
~	Bitwise Complement (or) One's Complement

Bitwise Operatot Truth Table

Bitwise Operator performs bit by bit operation.

X	Y	X & Y	X \| Y	X ^ Y
0	0	0	0	0
0	1	0	1	1
1	0	0	1	1
1	1	1	1	0

Left Shift Operator

Consider the statement
X=19;
Z=X<<2;
The value in the integer X is shifted left by two bit positions. The result is assigned to Z.The value of X is 0001 0011₂ the value of Z after the execution the value of Z is 0100 1100₂.

0001 0011₂	Left Shift(2)
0100 1100₂	<-- Insert 2 Zero's (0)

Right Shift Operator

Consider the statement
X=19;
Z=X<<2;
The value in the integer X is shifted Right by two bit positions. The result is assigned to Z.The value of X is 0001 0011₂ the value of Z after the execution the value of Z is 0000 0100₂.

Right Shift(2)	0001 0011₂
Insert 2 Zero's (0) -->	0100 1100₂

Bitwise Complement Operator

operand must be of integral type. Each 0 bit in the operand is set to 1, and each 1 bit in the operand is set to 0.
Consider the statement
X=19;
Z=~x;
X=0001 0011₂
Z=1110 1100₂

Bitwise operator Example:

#include<stdio.h>
int main()
{
int X=19,Y=16,Z;
Z=X&Y;
printf("X&Y=%d\n",Z);
Z=X|Y;
printf("X|Y=%d\n",Z);
Z=X^Y;
printf("X^Y=%d\n",Z);
Z=X<<2;
printf("X<<2=%d\n",Z);
Z=X>>2;
printf("X>>2=%d\n",Z);
Z=~X;
printf("~X=%d\n",Z);
return 0;
}

Output

X&Y=16
X|Y=19
X^Y=3
X<<2=76
X>>2=4
~X=-20

Assume that X=19, Y=16, the binary format will be as follows.
X = 0001 0011₂ - 19₁₀
Y = 0001 0000₂ - 16₁₀

	Binary	Decimal
X & Y	0001 0000	16₁₀
X \| Y	0001 0011₂	19₁₀
X ^ Y	0000 0011₂	3₁₀
X<<2	0100 1100₂	76₁₀
X>>2	0000 0100₂	4₁₀
~X	1110 1100₂	-20₁₀

Categories: Learn C

Assignment Operators in C

Assignment Operators are used to assign a value of an expression or a value of a variable to another variable. The most commonly used assignment operator is "=". There are two different Assignment Operators are available in C 1.Compound Assignment, 2.Multiple Assignment.

Syntex

variable = expression (or) value;
The '=' operator is the simple Assignment operator. Example:

#include<stdio.h>
int main()
{
int x; // Declaration of a variable
x=5;   // Assignment Operator
printf("x=%d",x);
return 0;
}

Compound Assignment

Compound Assignment Operator is to assign a value to a variable in order to assign a new value to a variable arter performing a specifed operation.

Operator	Example	Meaning
+ =	X + = Y	X = X + Y
- =	X - = Y	X = X - Y
* =	X * = Y	X = X * Y
/ =	X / = Y	X = X / Y
% =	X % = Y	X = X % Y

#include<stdio.h>
int main()
{
int x=5,y=5; // Declaration of a variable
x+=y;   // Compound Assignment X = X + Y
printf("x=%d",x);
return 0;
}

Multiple Assignment

Using Multiple Assignment we can assign a single value or an expression to multiple variables. Example:

#include<stdio.h>
int main()
{
int x,y,z=5; // Declaration of a variable
x=y=z;   // Multiple Assignment X=Y=Z(5)
printf("x=%d,y=%d,z=%d",x,y,z);
return 0;
}

Categories: Learn C

Arithmetic Operators in C

In "C " language we can carryout basic arithmetic operation like addition, subtraction, multiplication and division. Both unary and binary are Arithmetic Operator.

Arithmetic Operators

Operator	Meaning	Example
+	Addition	7 + 3 = 10
-	Subtraction	10 - 3 = 7
*	Multiplication	5 * 2 = 10
/	Division	10 / 2 = 5
%	Modulus	9 % 2 = 1

//  Arithmetic Operators
#include<stdio.h>
int main()
{
int X=16,Y=10,Z;
Z=X+Y;
printf("X+Y=%d\n",Z);
Z=X-Y;
printf("X-Y=%d\n",Z);
Z=X*Y;
printf("X*Y=%d\n",Z);
Z=X/Y;
printf("X/Y=%d\n",Z);
Z=X%Y;
printf("X%%Y=%d\n\b",Z); 
return 0;
}

Output

X+Y=26
X-Y=6
X*Y=160
X/Y=1
X%Y=6

Categories: Learn C

Operator and Punctuators

An operator is a symbol that specifies an operation to be performed on the operands. The data items are called operands. The operators are usually form a part of mathematical or logical expressions.

Types of Operator and Punctuators

Arithmetic Operator
Assignment Operator
Bitwise Operator
Conditional Operator ( Ternary Operator )
Logical Operator
Relational Operator
Unary Operator
Punctuators

Categories: Learn C

Constants ( Literals )

The values cannot be changed during the execution of program are called constants. The fixed values are also called literals.

Types of Constants ( Literals )

Integer Constants

Integer Constants are numbers that do not have a decimal point or an exponential part.
They can be represented as:

Decimal Number	0 to 9	Ex: 7, 8, 6, -80, 786, etc.,
Octal Number	0 to 7	EX: 0, 012, 052, etc.,
Hexadecimal Number	0 to 9, A, B, C, D, E, F	Ex: 0x786, 0xA123, 0x2b, etc.,

Float Constants

Float Constants are numbers that have a decimal point or an exponential part.
They can be represented as:

Float Constant	Value
7.867e3	7,867
4e-11	0.00000000004
1e+5	100000
7.e10	60000000000
0.16	0.16

Character Constants

Character Constants contains a single character enclosed within a single quotation mark symbol.
Ex: 'M', 'A', '9', '-', etc.., .

String Constants

A String Constants contains a sequence of characters or escape sequences enclosed in double quotation mark symbols.
EX:"MDSN", "Learn C\n", " ", etc.., .

How to Define a Constant in C

There are two simple ways to define Constants.

#define ( Preprocessor)
Example:


#include <stdio.h>
#define Length 10    //Preprocessor
#define Width 5      //Preprocessor
int main(){
int Area;
Area=Length*Width;
printf("Area=%d",Area);
return 0;
}

const ( Keyword )
Example:


 #include <stdio.h>
int main(){
const Length=10, Width=5;  // Keyword
int Area;
Area=Length*Width;
printf("Area=%d",Area);
return 0;
}

Categories: Learn C

C and C++ Keywords

Keywords are already been explained in the C compiler. We can’t use keywords as variable names because it’s already defined in C compiler. The keywords are also called as “Reserved words”.

C and C++ Keywords

auto	extern	sizeof
break	float	static
case	for	struct
char	goto	switch
const	if	typdef
continue	int	union
default	long	unsigned
do	register	void
double	return	volatile
else	short	while
enum	signed

C++ Kewords

asm	inline	this
bool	mutable	throw
catch	namespace	true
class	new	try
const_cast	operator	typeid
delete	private	typename
dynamic_cast	protected	using
explicit	public	virtual
export	reinterpret_cast	wchar_t
false	static_cast
friend	template

Categories: Learn C

MDSN Software

Windows tweaks tips and tricks

Register or Install , unregister or Uninstall OCX and DLL in Windows.Register or Unregister OCX and DLL using administrator cmd in Windows.Register or Unregister OCX and DLL using context menu in Windows.

How to create a CLSID in Windows.Open files (exe, txt, etc., ) and folders from My Computer Control Panel,Context menu right click in Windows.

How to create own name File and Folder using context menu right click in Windows.Editing context menu new menu items in Windows.

1.Run from Start Menu.

2.Run from any Folder.

3.Run form Quick Access Toolbar.

4.Run form Context Menu.

Video

Escape Sequence with ASCII Value

Output

Operator Precedence and Associativity

Output

Punctuator

Unary Operator

Referencing operator ('&')

Dereferencing Operator ('*')

Unary ( +, - ) Operator

Increment Operator (++) & Decrement Operator (--)

Output

Logical Not Operator

Bitwise Complement Operator

Sizeof Operator

Type Cast

Logical Operators

Truth Table of Logical Operator

Relational operator

Output

Syntex

Bitwise operators

Bitwise Operatot Truth Table

Left Shift Operator

Right Shift Operator

Bitwise Complement Operator

Output

Syntex

Compound Assignment

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How to Define a Constant in C

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Register or Install , unregister or Uninstall OCX and DLL in Windows.
Register or Unregister OCX and DLL using administrator cmd in Windows.
Register or Unregister OCX and DLL using context menu in Windows.

How to create a CLSID in Windows.
Open files (exe, txt, etc., ) and folders from My Computer Control Panel,Context menu right click in Windows.

How to create own name File and Folder using context menu right click in Windows.
Editing context menu new menu items in Windows.