Window API 创建窗体_load window api-优快云博客

本文链接：https://blog.youkuaiyun.com/meiscoco/article/details/4776549

本文介绍了一个简单的Windows程序框架实现过程，包括窗口类注册、实例初始化及消息循环等关键步骤，并展示了如何创建一个基本的窗口。

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#include <windows.h>

#define szWindowClass "MyWClass";

ATOM MyRegisterClass(HINSTANCE);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK MainProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(
                   HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nShowCmd
                   )
{
    MSG msg;

   MyRegisterClass(hInstance);

   InitInstance(hInstance, nShowCmd);



   while(GetMessage(&msg, NULL, 0, 0))
   {
       TranslateMessage(&msg);
       DispatchMessage(&msg);
   }

   return 0;

}

ATOM MyRegisterClass(HINSTANCE hInstance)
{
   WNDCLASSEX wce;

   wce.cbSize = sizeof(wce);
   wce.style = CS_HREDRAW|CS_VREDRAW;
   wce.lpfnWndProc = MainProc;
   wce.cbClsExtra = 0;
   wce.cbWndExtra = 0;
   wce.hInstance = hInstance;
   wce.hIcon = NULL;
   wce.hCursor = LoadCursor(NULL, IDC_ARROW);
   wce.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
   wce.lpszMenuName = NULL;
   wce.lpszClassName = szWindowClass;
   wce.hIconSm = NULL;

   return RegisterClassEx(&wce);
}

BOOL InitInstance(HINSTANCE hInstance, int nShowCmd)
{
   HWND hWnd;

   hWnd = CreateWindow(
                        "MyWClass",
                       "cocoDialog",
                       WS_SYSMENU,
                       150,
                       150,
                       800,
                       600,
                       NULL,
                       NULL,
                       hInstance,
                       NULL
                       );

   ShowWindow(hWnd, nShowCmd);
   UpdateWindow(hWnd);

   return TRUE;
}

LRESULT CALLBACK MainProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
   switch(uMsg)
   {
   case WM_DESTROY:
       PostQuitMessage(0);
   default :
       return DefWindowProc(hWnd, uMsg, wParam, lParam);
   }
}