关于数据库:一段基本的win32项目示例

include<windows.h>

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

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,

            PSTR szCmdLine, int iCmdShow)

{

static TCHAR szAppName[] = TEXT("HelloWin");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("注册失败!"), szAppName, MB_ICONERROR);    return 0;}hwnd = CreateWindow(                    szAppName,        TEXT("The Hello Program"),        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("Hello Windows!"), -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);https://github.com/threebb1/utvwcwdvks/discussions/1

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