论坛 › Windows程序设计 › 为什么我写的windows窗口无法运行

永世不结婚 发表于 2021-3-31 20:41:49

为什么我写的windows窗口无法运行

#include<Windows.h>
LRESULT CALLBACK Wndproc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hlnstance,HINSTANCE hPrevlstance,PSTR szCmdLine,int iCmdShow)
{
        static TCHAR szAppName[] = L"MyWindoww";
        HWND hwnd;
        MSG msg;
        WNDCLASS wndclass;
        wndclass.style = CS_HREDRAW | CS_VREDRAW;
        wndclass.lpfnWndProc = Wndproc;
        wndclass.cbClsExtra = 0;
        wndclass.cbWndExtra = 0;
        wndclass.hInstance = hlnstance;
        wndclass.hIcon = Loadlcon(NULL, IDI_APPLICATION);
        wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
        wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
        wndclass.lpszMenuName = NULL;
        wndclass.lpszClassName = szAppName;
       
        if(!RegisterClass(&wndclass))
        {
                MessageBox(NULL, TEXT("HHHHHHHH"), szAppName, MB_ICONERROR);
                return 0;
        }

        hwnd = CreateWindow(szAppName, TEXT("huhao"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hlnstance, NULL);
        while (GetMessage(&msg,NULL,0,0))
        {
                TranslateMessage(&msg);
                DispatchMessage(&msg);
        }
        return msg.wParam;
}
LRESULT CALLBACK Wndpoc(HWND hwnd,UINT message,WPARAM wparam,LPARAM lparam)
{
        HDC hdc;
        PAINTSTRUCT ps;
        RECT rect;
        switch (message)
        {
        case WM_PAINT:
                hdc = BeginPaint(hwnd, &ps);
                GetClientRect(hwnd, &rect);
                DrawText(hdc, TEXT("jjjjjjjjjj"), -1, &rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
                EndPaint(hwnd, &ps);
                return 0;
        case WM_DESTROY:
                PostQuitMessage(0);
                return 0;

        }
}

猫和狼 发表于 2021-4-27 11:20:12

最后一行加上return DefWindowProc（hdc，message，wParam，lParam）；

临时号 发表于 2021-7-25 15:18:37

本帖最后由 临时号 于 2021-7-25 15:20 编辑

以后细心一点,这个代码里好多I被写成了l,这个是改完后的代码,可以显示窗口了,#include <windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
        static TCHAR szAppName[] = L"MyWindoww";
        HWND hwnd;
        MSG msg;
        WNDCLASS wndclass;

        wndclass.style = CS_HREDRAW | CS_VREDRAW;
        wndclass.lpfnWndProc = WndProc;
        wndclass.cbClsExtra = 0;
        wndclass.cbWndExtra = 0;
        wndclass.hInstance = hInstance;
        wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
        wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
        wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
        wndclass.lpszMenuName = NULL;
        wndclass.lpszClassName = szAppName;

        if (!RegisterClass(&wndclass))
        {
                MessageBox(NULL, TEXT("HHHHHHHH"), szAppName, MB_ICONERROR);
                return 0;
        }

        hwnd = CreateWindow(szAppName, TEXT("huhao"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);

        ShowWindow(hwnd, iCmdShow);
        UpdateWindow(hwnd);

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

        return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
        HDC hdc;
        PAINTSTRUCT ps;
        RECT rect;

        switch (message)
        {
        case WM_PAINT:
                hdc = BeginPaint(hwnd, &ps);
                GetClientRect(hwnd, &rect);
                DrawText(hdc, TEXT("jjjjjjjjjj"), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
                EndPaint(hwnd, &ps);
                return 0;

        case WM_DESTROY:
                PostQuitMessage(0);
                return 0;
        }

        return DefWindowProc(hwnd, message, wParam, lParam);
}

查看完整版本: 为什么我写的windows窗口无法运行