參考資訊:
http://www.winprog.org/tutorial/
http://winapi.freetechsecrets.com/win32/
https://github.com/gammasoft71/Examples_Win32
http://masm32.com/board/index.php?topic=3584.0
https://learn.microsoft.com/en-us/windows/win32/winmsg/window-styles
繪畫的顏色設定可以分成Brush、Pen兩種,Brush代表填充的顏色,Pen則是線條的顏色
main.c
#include <windows.h> HWND hWin = NULL; WNDPROC defWndProc = NULL; LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { HDC hdc = NULL; HBRUSH brush = NULL; PAINTSTRUCT ps = {0}; switch (uMsg) { case WM_CLOSE: DestroyWindow(hWnd); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; case WM_PAINT: hdc = BeginPaint(hWnd, &ps); brush = CreateSolidBrush(RGB(0xff, 0x00, 0x00)); FillRect(hdc, &ps.rcPaint, brush); EndPaint(hWnd, &ps); DeleteObject(brush); break; } return CallWindowProc(defWndProc, hWnd, uMsg, wParam, lParam); } int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { hWin = CreateWindow(WC_DIALOG, "main", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, NULL); defWndProc = (WNDPROC)SetWindowLongPtr(hWin, GWLP_WNDPROC, (long int)WndProc); MSG msg = {0}; while (GetMessage(&msg, NULL, 0, 0)) { DispatchMessage(&msg); } ExitProcess(0); return 0; }
Line 21:產生一個紅色的Brush
Line 22:將可視區域填入紅色
Line 24:釋放資源
編譯、執行
$ i686-w64-mingw32-gcc -mwindows main.c -o main.exe $ wine ./main.exe