Create escakekey.c

firststeps/escakekey.c

@@ -0,0 +1,58 @@
+#include <windows.h>
+
+LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
+
+
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, 
+                    PWSTR pCmdLine, int CmdShow) {
+                    
+    MSG  msg;    
+    WNDCLASSW wc = {0};
+    wc.lpszClassName = L"Escape";
+    wc.hInstance     = hInstance;
+    wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
+    wc.lpfnWndProc   = WndProc;
+    wc.hCursor       = LoadCursor(0, IDC_ARROW);
+    
+    RegisterClassW(&wc);
+    CreateWindowW(wc.lpszClassName, L"Escape",
+                  WS_OVERLAPPEDWINDOW | WS_VISIBLE,
+                  100, 100, 250, 180, 0, 0, hInstance, 0);  
+
+  while (GetMessage(&msg, NULL, 0, 0)) {
+  
+      TranslateMessage(&msg);
+      DispatchMessage(&msg);
+  }
+
+  return (int) msg.wParam;
+}
+
+LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, 
+    WPARAM wParam, LPARAM lParam) {
+    
+    switch(msg) {
+  
+        case WM_KEYDOWN:
+
+            if (wParam == VK_ESCAPE) {
+      
+                int ret = MessageBoxW(hwnd, L"Are you sure to quit?", 
+                                  L"Message", MB_OKCANCEL);
+                                  
+                if (ret == IDOK) {
+          
+                    SendMessage(hwnd, WM_CLOSE, 0, 0);
+                }
+             }
+      
+             break;
+
+        case WM_DESTROY:
+
+            PostQuitMessage(0);
+            break; 
+    }
+
+    return DefWindowProcW(hwnd, msg, wParam, lParam);
+}