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Simulate a keystroke in windows

, 22 Feb 2011 CPOL 22.1K 7
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This tip shows how to simulate a key stroke in windows environment
void SetNumLock( BOOL bState )
{
   BYTE keyState[256];
 
   GetKeyboardState((LPBYTE)&keyState);
   if( (bState && !(keyState[VK_NUMLOCK] & 1)) ||
       (!bState && (keyState[VK_NUMLOCK] & 1)) )
   {
   // Simulate a key press
      keybd_event( VK_NUMLOCK,
                   0x45,
                   KEYEVENTF_EXTENDEDKEY | 0,
                   0 );
 
   // Simulate a key release
      keybd_event( VK_NUMLOCK,
                   0x45,
                   KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP,
                   0);
   }
}
 
void main()
{
   SetNumLock( TRUE );
}

Reference MSDN (Thanx to Victor Nijegorodov)

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Mukit, Ataul
Chief Technology Officer Rational Technologies
Bangladesh Bangladesh
Your Lord does not like people who waste by extravagance, and only the righteous C s, and does so in increments, and they are of those people who are mindful of what memory and time has in offer and they waste none of it.
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Comments and Discussions

 
GeneralRe: Extend it to what.. a full article? Pin
Mukit, Ataul23-Aug-11 22:16
memberMukit, Ataul23-Aug-11 22:16 
GeneralRe: I say it because you I think you must extend it before publi... Pin
Caner Korkmaz23-Aug-11 5:40
memberCaner Korkmaz23-Aug-11 5:40 
GeneralReason for my vote of 1 I agree with the others, copying a c... Pin
AspDotNetDev1-Sep-11 8:58
protectorAspDotNetDev1-Sep-11 8:58 
GeneralReason for my vote of 1 It is copy and paste !!! Pin
Caner Korkmaz23-Aug-11 3:10
memberCaner Korkmaz23-Aug-11 3:10 
GeneralRe: Just becoz u knew it b4hand, doesn't mean everybody knows it... Pin
Mukit, Ataul23-Aug-11 5:18
memberMukit, Ataul23-Aug-11 5:18 
GeneralRe: I agree, all the OP has done is copy some code from somewher... Pin
AspDotNetDev1-Sep-11 8:54
protectorAspDotNetDev1-Sep-11 8:54 
GeneralReason for my vote of 1 nothing new Pin
bomihsc24-Mar-11 14:47
memberbomihsc24-Mar-11 14:47 
GeneralRe: nothing new to u.. so i guess u r entitled to give a 1... Pin
Mukit, Ataul26-Mar-11 19:57
memberMukit, Ataul26-Mar-11 19:57 
GeneralReason for my vote of 3 good Pin
Diogny Aguilera22-Feb-11 8:06
memberDiogny Aguilera22-Feb-11 8:06 
GeneralReason for my vote of 5 Good reference. If I used this, I wo... Pin
jonathanbeyre22-Feb-11 5:10
memberjonathanbeyre22-Feb-11 5:10 
GeneralReason for my vote of 1 Incomplete and badly researched Pin
wim ton21-Feb-11 23:56
memberwim ton21-Feb-11 23:56 
GeneralRe: I thought tips was not about extensive research.. just somet... Pin
Mukit, Ataul22-Feb-11 0:28
memberMukit, Ataul22-Feb-11 0:28 
General[My vote of 2] Is it a plagiarism or you just forgot to provide a link_ Pin
Victor Nijegorodov21-Feb-11 23:31
memberVictor Nijegorodov21-Feb-11 23:31 
GeneralRe: [My vote of 2] Is it a plagiarism or you just forgot to provide a link_ Pin
Mukit, Ataul22-Feb-11 0:37
memberMukit, Ataul22-Feb-11 0:37 
GeneralRe: [My vote of 2] Is it a plagiarism or you just forgot to provide a link_ Pin
Victor Nijegorodov22-Feb-11 0:51
memberVictor Nijegorodov22-Feb-11 0:51 
GeneralRe: [My vote of 2] Is it a plagiarism or you just forgot to provide a link_ Pin
Mukit, Ataul22-Feb-11 0:53
memberMukit, Ataul22-Feb-11 0:53 
GeneralRe: [My vote of 2] Is it a plagiarism or you just forgot to provide a link_ Pin
Victor Nijegorodov22-Feb-11 1:04
memberVictor Nijegorodov22-Feb-11 1:04 
GeneralRe: [My vote of 2] Is it a plagiarism or you just forgot to provide a link_ Pin
Mukit, Ataul22-Feb-11 1:22
memberMukit, Ataul22-Feb-11 1:22 
GeneralRe: [My vote of 2] Is it a plagiarism or you just forgot to provide a link_ Pin
PrafullaVedante2-Mar-11 21:00
memberPrafullaVedante2-Mar-11 21:00 
GeneralRe: [My vote of 2] Is it a plagiarism or you just forgot to provide a link_ Pin
Mukit, Ataul4-Mar-11 21:14
memberMukit, Ataul4-Mar-11 21:14 

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