keyboard hook repeating charactor

Question

0.00/5 (No votes)

See more:

hi all . i am trying to implement keyboard hook ,it works however it repeats entered char for eg. if i enter hello it gives
HHHHHHHHHHHHHHHHHHHHHEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLOOOOOOOOOOOOOOOOOOOOO

can any one help me here ?

i am using windows server 2008 r2 64 bit standard edition , with vs 2005 professional.

LRESULT   __declspec(dllexport)__stdcall  CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
	ofstream fout;
	fout.open("c:\\viv.txt",ios::app);

	static BOOL flag = FALSE ;
	static BYTE key ;

	if ( nCode < 0 )
		return CallNextHookEx ( hkb, nCode, wParam, lParam ) ;

	if ( ( nCode == HC_ACTION ) && (  (((DWORD)lParam & 0x80000000) == 0 ) && (((DWORD)lParam & 0x40000000 ) == 0 ) ))
	{
		if ((wParam==VK_SPACE)||(wParam==VK_RETURN)||((wParam>=0x2f ) &&(wParam<=0x100))) 
		{
			if(wParam != VK_RETURN)
			{
				key = (BYTE)wParam;
				fout<<key;
			}
		}
	}
		
	fout.close();

   return CallNextHookEx(hkb, nCode, wParam, lParam);
}

Posted 18-Jul-11 18:42pm

Vivek_Mendse

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

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

Prerak Patel · Answer 1 · 2011-07-18T18:50:00

Solution 1

You must use KeyUp or KeyDown to log the keys. Check this sample in VB.Net
http://sim0n.wordpress.com/2009/03/28/vbnet-keyboard-hook-class/[^]

Posted 18-Jul-11 18:50pm

Prerak Patel

Vivek_Mendse · Answer 2 · 2011-07-18T19:26:00

did not work , any way thanks for reply

switch(wParam)
{
case WM_KEYDOWN:
    keystat = 1;
    break;
case WM_KEYUP:
    if(keystat == 1)
    {
        keystat = 2;
        key = (BYTE)wParam;
        fout<<key;
    }
    break;
default:
    if(keystat == 2)
    {
        keystat = 0;
        key = (BYTE)wParam;
        fout<<key;
    }
}