背景色とモード

背景の描画

#include <windows.h>

LRESULT CALLBACK WndProc(HWND hwnd , UINT msg , WPARAM wp , LPARAM lp) {
	HDC hdc;
	PAINTSTRUCT ps;
	TEXTMETRIC tm;
	LPTSTR lptStr = TEXT("Kitty on your lap");

	switch (msg) {
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	case WM_PAINT:
		hdc = BeginPaint(hwnd , &ps);
		GetTextMetrics(hdc , &tm);

		SetBkColor(hdc , RGB(0xFF , 0 , 0));
		TextOut(hdc , 10 , 10 , lptStr , lstrlen(lptStr));

		SetBkMode(hdc , TRANSPARENT);
		TextOut(hdc , 10 , 10 + tm.tmHeight , lptStr , lstrlen(lptStr));
		EndPaint(hwnd , &ps);
		return 0;
	}
	return DefWindowProc(hwnd , msg , wp , lp);
}

int WINAPI WinMain(HINSTANCE hInstance , HINSTANCE hPrevInstance ,
			PSTR lpCmdLine , int nCmdShow ) {
	HWND hwnd;
	MSG msg;
	WNDCLASS winc;

	winc.style		= CS_HREDRAW | CS_VREDRAW;
	winc.lpfnWndProc	= WndProc;
	winc.cbClsExtra	= winc.cbWndExtra	= 0;
	winc.hInstance		= hInstance;
	winc.hIcon		= LoadIcon(NULL , IDI_APPLICATION);
	winc.hCursor		= LoadCursor(NULL , IDC_ARROW);
	winc.hbrBackground	= (HBRUSH)GetStockObject(WHITE_BRUSH);
	winc.lpszMenuName	= NULL;
	winc.lpszClassName	= TEXT("KITTY");

	if (!RegisterClass(&winc)) return -1;

	hwnd = CreateWindow(
			TEXT("KITTY") , TEXT("Kitty on your lap") ,
			WS_OVERLAPPEDWINDOW | WS_VISIBLE ,
			CW_USEDEFAULT , CW_USEDEFAULT ,
			CW_USEDEFAULT , CW_USEDEFAULT ,
			NULL , NULL , hInstance , NULL
	);


	if (hwnd == NULL) return -1;

	while(GetMessage(&msg , NULL , 0 , 0)) DispatchMessage(&msg);
	return msg.wParam;
}

SetBkColor()

SetBkMode()

GetBkColor()

GetBkMode()