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Question

这里面哪有错#include<windows.h>
#include<winuser.h> 
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,
   PSTR szCmdLine,int iCmdShow)
{
static TCHAR szAppName[]=TEXT("GENIUS");
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("This program requires Window NT!"),
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.lParam ;
}
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,window XP"),-1,&rect,
 DT_SINGLELINE|DT_CENTER|DT_VCENTER);
 EndPaint(hwnd,&ps);
 return 0;
case WM_DESTROY:
PostQiutMessage(0);
return 0;
}
return DefWindowProc(hwnd,message,wParam,lParam);
}

Answer 1

看看哪里有错.
indows_creatwin\1.cpp(11) : error C2065: 'WndProc' : undeclared identifier
 windows_creatwin\1.cpp(11) : error C2440: '=' : cannot convert from 'int' to 'long (__stdcall *)(struct HWND__ *,unsigned int,unsigned int,long)'
        Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
 \windows_creatwin\1.cpp(47) : error C2373: 'WndProc' : redefinition; different type modifiers
 \windows_creatwin\1.cpp(61) : error C2065: 'PostQiutMessage' : undeclared identifier
执行 cl.exe 时出错.
输出这个我不会改

Answer 2

把WndProc函数放到WinMain函数之前。
PostQiutMessage该成PostQuitMessage。

Answer 3

怎么把WndProc函数放到WinMain函数之前?什么意思?为什么?

Answer 4

先定义WndProc，后定义WinMain。

Answer 5

#include<windows.h>
#include<winuser.h> 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,window XP"),-1,&rect,
             DT_SINGLELINE|DT_CENTER|DT_VCENTER);
         EndPaint(hwnd,&ps);
         return 0;
    case WM_DESTROY:
        PostQiutMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd,message,wParam,lParam);
}int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,
                   PSTR szCmdLine,int iCmdShow)
{
    static TCHAR szAppName[]=TEXT("GENIUS");
    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("This program requires Window NT!"),
            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.lParam ;
}