How to keep my exe running to disable print screen?

[Kurosan]

I'm using the following code to disable print screen. The problem is that my program will terminate once it hits the "return 0" statement in WinMain() , how to keep my exe program running so as to enforce the disabling?

BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM lParam);
typedef UINT (CALLBACK* LPREGISTERSERVICEPROC)(DWORD,DWORD);

HHOOK hhkLowLevelKybd;

LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
BOOL fSuppressKeystroke = FALSE;

if (nCode == HC_ACTION) {
switch (wParam) {
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_SYSKEYUP:
PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT)lParam;
fSuppressKeystroke = ((p->vkCode == VK_SNAPSHOT));
break;
}
}

return (fSuppressKeystroke? 1: CallNextHookEx(NULL, nCode, wParam, lParam));
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, PTSTR pszCmdLine, int nCmdShow)
{
// start disabling the PrintScreen key
hhkLowLevelKybd = SetWindowsHookEx(WH_KEYBOARD_LL, LowLevelKeyboardProc, hInstance, 0);

return 0;
}

[leojose]

add this before the return 0

    while(GetMessage(&msg, NULL, NULL, NULL))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

[Kurosan]

leojose

What is the equivalence of your 'msg' in my code or is it a new variable to be defined?

[leojose]

l
What is the equivalence of your 'msg' in my code or is it a new variable to be defined?

msg is a MSG Structure
So you just need to define it like this...

MSG msg

[Kurosan]

Thanks leojose, it's working. Is there any way to hide my program from the Task Manager under WinXP?