check_c_source_compiles("
#include <windows.h>

int main(int argc, char *argv[]) {
	HWND hwnd;
	HDC hdc;
	HGLRC hglrc;

	hwnd = CreateWindowEx(0, \"a\", \"a\", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,
	    CW_USEDEFAULT, 0,0, NULL, NULL, GetModuleHandle(NULL), NULL);
	hdc = GetDC(hwnd);
	hglrc = wglCreateContext(hdc);
	SwapBuffers(hdc);
	wglDeleteContext(hglrc);
	ReleaseDC(hwnd, hdc);
	DestroyWindow(hwnd);
	return (0);
}
" HAVE_WGL)