WINDOWS窗口创建及消息处理代码

野性酷女 2022-04-10 09:13 176阅读 0赞

以前看过很多次，现在默默的一个一个打出来。。

代码：

1 /* header file */
     2 #include <Windows.h>
     3 
     4 /* global var */
     5 HINSTANCE hinst;
     6 
     7 /* function declaire*/
     8 int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int);
     9 LRESULT CALLBACK MainWndProc(HWND, UINT, WPARAM, LPARAM);
    10 
    11 /* function display a window */
    12 int WINAPI WinMain(HINSTANCE hInstance,
    13     HINSTANCE hPrevInstance,
    14     LPSTR lpCmdLine,
    15     int nCmdShow)
    16 {
    17     WNDCLASSEX wcx;        //windows class
    18     HWND hwnd;            //windows handle
    19     MSG msg;            //message
    20     BOOL fGotMessage;    //if get message succeed
    21     hinst = hInstance;    //app object handle , it's save global var
    22     //fill window form data struct
    23     wcx.cbSize = sizeof(wcx);    //size of struct
    24     wcx.style = CS_HREDRAW | CS_VREDRAW;    //style:redraw GUI when change size
    25     wcx.lpfnWndProc = MainWndProc;        //function of deal windows Message
    26     wcx.cbClsExtra = 0;        //don't use class mem
    27     wcx.cbWndExtra = 0;        //don't use windows form mem
    28     wcx.hInstance = hInstance;        //belong to APP instance handle
    29     wcx.hIcon = LoadIcon(NULL,IDI_APPLICATION);        //ICON,default
    30     wcx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); //background:white
    31     wcx.lpszMenuName = NULL;        //menu:null
    32     wcx.lpszClassName = "MainWClass";        //windows form class name
    33     wcx.hIconSm = (HICON)LoadImage(hInstance,        //little icon
    34         MAKEINTRESOURCE(5),
    35         IMAGE_ICON,
    36         GetSystemMetrics(SM_CXSMICON),
    37         GetSystemMetrics(SM_CYSMICON),
    38         LR_DEFAULTCOLOR);
    39 
    40     //register windows form class
    41     if(!RegisterClassEx(&wcx))
    42     {
    43         return 1;
    44     }
    45 
    46     //create windows form
    47     hwnd = CreateWindow(
    48         "MainWClass",        //windows form name
    49         "CH 2-3",        //windows form title
    50         WS_OVERLAPPEDWINDOW,    //windows form style
    51         CW_USEDEFAULT,        //x:default
    52         CW_USEDEFAULT,        //Y:default
    53         CW_USEDEFAULT,        //width:default
    54         CW_USEDEFAULT,        //heigh:default
    55         (HWND) NULL,        //parent class:none
    56         (HMENU) NULL,        //menu:make window form menu
    57         hInstance,        //APP programe instance handle
    58         (LPVOID) NULL);        //data when create window form:none
    59 
    60     if(!hwnd)
    61     {
    62         return 1;
    63     }
    64 
    65     //display window form
    66     ShowWindow(hwnd, nCmdShow);
    67     UpdateWindow(hwnd);
    68 
    69     //get message again and again
    70     while(
    71         (fGotMessage = GetMessage(&msg, (HWND) NULL, 0, 0)) != 0
    72         && fGotMessage != -1)
    73     {
    74         TranslateMessage(&msg);
    75         DispatchMessage(&msg);
    76     }
    77     return msg.wParam;
    78 }
    79 
    80 /* MainWndProc 
    81 function of deal with windows form message*/
    82 LRESULT CALLBACK MainWndProc(HWND hwnd,
    83     UINT uMsg,
    84     WPARAM wParam,
    85     LPARAM lParam
    86     )
    87 {
    88     switch (uMsg)
    89     {
    90     case WM_DESTROY:
    91         ExitThread(0);
    92         return 0;
    93     default:
    94         return DefWindowProc(hwnd, uMsg, wParam, lParam);
    95     }
    96 }

截图：

窗口没出来。。

![06150917-9907331a72f145fd8220f8cd13d3bb2f.png][]

[06150917-9907331a72f145fd8220f8cd13d3bb2f.png]: /images/20220401/e77d77c17a7640e2850b03bbcd2421b5.png