67 lines
2.3 KiB
Plaintext
67 lines
2.3 KiB
Plaintext
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#include <windows.h>
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/* This is where all the input to the window goes to */
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LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam) {
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switch(Message) {
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/* Upon destruction, tell the main thread to stop */
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case WM_DESTROY: {
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PostQuitMessage(0);
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break;
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}
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/* All other messages (a lot of them) are processed using default procedures */
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default:
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return DefWindowProc(hwnd, Message, wParam, lParam);
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}
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return 0;
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}
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/* The 'main' function of Win32 GUI programs: this is where execution starts */
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int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
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WNDCLASSEX wc; /* A properties struct of our window */
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HWND hwnd; /* A 'HANDLE', hence the H, or a pointer to our window */
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MSG msg; /* A temporary location for all messages */
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/* zero out the struct and set the stuff we want to modify */
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memset(&wc,0,sizeof(wc));
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wc.cbSize = sizeof(WNDCLASSEX);
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wc.lpfnWndProc = WndProc; /* This is where we will send messages to */
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wc.hInstance = hInstance;
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wc.hCursor = LoadCursor(NULL, IDC_ARROW);
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/* White, COLOR_WINDOW is just a #define for a system color, try Ctrl+Clicking it */
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wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
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wc.lpszClassName = "WindowClass";
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wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* Load a standard icon */
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wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); /* use the name "A" to use the project icon */
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if(!RegisterClassEx(&wc)) {
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MessageBox(NULL, "Window Registration Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
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return 0;
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}
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hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,"WindowClass","Caption",WS_VISIBLE|WS_OVERLAPPEDWINDOW,
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CW_USEDEFAULT, /* x */
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CW_USEDEFAULT, /* y */
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640, /* width */
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480, /* height */
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NULL,NULL,hInstance,NULL);
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if(hwnd == NULL) {
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MessageBox(NULL, "Window Creation Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
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return 0;
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}
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/*
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This is the heart of our program where all input is processed and
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sent to WndProc. Note that GetMessage blocks code flow until it receives something, so
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this loop will not produce unreasonably high CPU usage
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*/
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while(GetMessage(&msg, NULL, 0, 0) > 0) { /* If no error is received... */
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TranslateMessage(&msg); /* Translate key codes to chars if present */
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DispatchMessage(&msg); /* Send it to WndProc */
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}
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return msg.wParam;
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}
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