this is the source
#include <windows.h>
LRESULT WINAPI MainWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
HBRUSH background;
background = CreateSolidBrush(RGB(0xFF, 0x00, 0x00))...