求教VC++问题

来源：百度知道编辑：UC知道时间：2024/05/22 11:43:09

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

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
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 ="HelloWin";

if(!RegisterClass(&wndclass))
{
MessageBox(NULL,"窗口注册失败！","HelloWin",0);
return 0;
}

hwnd=CreateWindow("HelloWin",
"我的窗口", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,

把回调函数改一下,其他地方一个也不要动:
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
函数声明改不改无所谓

message改msg不行啊，编译时说msg是一个没声明的标识符。

msg

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