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#include <windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow){
static TCHAR szAppName[] = "app_name";
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
if(!RegisterClass(&wndclass)) {
MessageBox(NULL, "Class registration failed!", szAppName, MB_ICONERROR);
return 0;
}
hwnd = CreateWindow(szAppName, "caption", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 700, 700,
NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
HDC buffer;
HBITMAP bitmap_buffer;
#define TIMER 1
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){
HDC hdc;
PAINTSTRUCT ps;
RECT rect;
switch(message){
case WM_TIMER:
InvalidateRect(hwnd, NULL, true);
return 0;
case WM_CREATE:
hdc = GetDC(hwnd);
SetTimer(hwnd, TIMER, 100, 0);
bitmap_buffer = CreateCompatibleBitmap(hdc, 700, 700);
buffer = CreateCompatibleDC(hdc);
SelectObject(buffer, bitmap_buffer);
ReleaseDC(hwnd, hdc);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &rect);
FillRect(buffer, &rect, (HBRUSH)GetStockObject(BLACK_BRUSH));
TextOut(buffer, 100, 100, "this shouldn't flicker", strlen("this shouldn't flicker"));
BitBlt(hdc, 0, 0, 700, 700, buffer, 0, 0, SRCCOPY);
EndPaint(hwnd, &ps);
return 0;
case WM_CLOSE:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}