I was wondering...what causes this error? I defined the macros #define KEY_DOWN(vk_code)((GetASyncKeyState(vk_code) & 0x8000) ? 1 : 0) #define KEY_UP(vk_code)((GetASyncKeyState(vk_code) & 0x8000) ? 1 : 0) and used if(KEY_DOWN(VK_ESCAPE)) PostMessage(hWnd, WM_DESTROY, 0, 0); but it keeps giving this error: error C3861: 'GetASyncKeyState': identifier not found I included windows.h and even windowsx.h It's probably some stupid error that I overlooked but I couldn't find it.

WOW...OMG WOW...

Well, thanks for the answer, now my program works. :D

but I feel like such an idiot >_<