Query: Keyboard Hooks!

[Nirav Doshi]

Hello, I have an application which hooks up the keyboard of a given process by injecting a DLL into the process. Now in that DLL, I have a (shared) char buffer which stores each keystroke. I am trying to get the buffer from my application, which is failing! Is there anything I am missing here? :~ : Here's how my code goes:

...
#pragma data_seg(".WBA")
char	g_chBuffer[0x101];
#pragma data_seg()
#pragma comment(linker, "/section:.WBA,rws")

...
BOOL _declspec(dllexport) __stdcall GetAppBuffer(char *chfBufferOut)
{
    if(chfBufferOut == NULL)
    {
	return	FALSE;
    }

    char *pchBuffer = g_chBuffer;               // Here somehow, g_chBuffer is EMPTY! :((

    while((*chfBufferOut++ = *pchBuffer++) != 0);

    return	TRUE;
}
...

LRESULT _declspec(dllexport) CALLBACK GetKeyboardMsgs(int nCode, WPARAM wParam, LPARAM lParam)
{
...
    static char *pchBuffer = g_chBuffer;
...
    ToAscii(wParam, nScan, chKeyState, &wTemp, 0);
    *pchBuffer++ = char(wTemp);                      // The buffer is fine here
...
}

In my application code, where I am calling the function GetAppBuffer():

...MyFunction()
{
...
    static BOOL (__stdcall *fpGetAppBuffer)(char *) = NULL;
    if(m_hmodDLL != NULL)
    {
	memset(chBuffer, STRING_TERMINATOR, 0x101);
	fpGetAppBuffer = (BOOL (__stdcall *)(char *)) GetProcAddress(m_hmodDLL, "GetAppBuffer");
    }
...
    char chBuffer[0x101];
    memset(chBuffer, 0, 0x101);
    fpGetAppBuffer(chBuffer);            // It gets an empty chBuffer back! :(
....
}

Please reply with any of your comments/suggestions. Is there anything wrong, that I am doing here? Please write back even if you feel the question/code is not clear/insufficient. Thanks! Rgds, Nirav * Don't wish it was easier, wish you were better! *