c++6.0的程序运行总是不通过，求大神分析一下？

[Superxia999]

#include<windows.h>
INT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
char szClassName[]="windowclass1";
char szAppTitle[]="chen";
INT PASCAL WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpszCmdParam,INT nCmdShow)
{
	HWND hMainWnd;
	MSG msg;
	WNDCLASS myWC;
	if(!hPrevInstance)
	{
		myWC.style=CS_HREDRAW|CS_VREDRAW;
		myWC.lpfnWndProc=WndProc;
		myWC.cbClsExtra=0;
		myWC.cbWndExtra=0;
		myWC.hInstance=hInstance;
		myWC.hIcon=LoadIcon(NULL,IDI_APPLICATION);
		myWC.hCursor=LoadCursor(NULL,IDC_ARROW);
		myWC.hbrBackground=GetStockObject(WHITE_BRUSH);
		myWC.lpszMenuName=NULL;
		myWC.lpszClassName=szClassName;
	}
	hMainWnd=CreateWindow(
		szClassName,
		szAppTitle,
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,CW_USEDEFAULT,
		CW_USEDEFAULT,CW_USEDEFAULT,
		NULL,NULL,hInstance,NULL);
	ShowWindow(hMainWnd,SW_SHOWMAXIMIZED);
	UpdateWindow(hMainWnd);
	while(GetMessage(&msg,NULL,0,0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}
INT CALLBACK WndProc(HWND hMainwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
	char messageleft[]="the left button have been pushed";
	char messageright[]="the right button have been pushed";
	switch(message)
	{
	case WM_RBUTTONDOWN:
		{
		MessageBox(GetFocus(),messageright,"chen",MB_OK|MB_ICONINFORMATION);
		break;
		}
	
	case WM_LBUTTONDOWN:
		{
		MessageBox(GetFocus(),messageleft,"chen",MB_OK|MB_ICONINFORMATION);
		break;
		}
	case WM_DESTROY:
		{
			PostQuitMessage(0);
			return 0;
		}
	default:
		break;
	}
	return DefWindowProc(hMainwnd,message,wParam,lParam);
}

Configuration: progect4 - Win32 Debug--------------------
Compiling...
4.1.cpp
F:\software C++ 6.0\C++ Book 6.0\progect4\4.1.cpp(13) : error C2440: '=' : cannot convert from 'int (__stdcall *)(struct HWND__ *,unsigned int,unsigned int,long)' to 'long (__stdcall *)(struct HWND__ *,unsigned int,unsigned int,long)'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
F:\software C++ 6.0\C++ Book 6.0\progect4\4.1.cpp(19) : error C2440: '=' : cannot convert from 'void *' to 'struct HBRUSH__ *'
Conversion from 'void*' to pointer to non-'void' requires an explicit cast
Error executing cl.exe.

4.1.obj - 2 error(s), 0 warning(s)

[schlafenhamster]

不是 INT CALLBACK WndProc long WINAPI WndProc #define CALLBACK __stdcall #define WINAPI __stdcall #define WINAPIV __cdecl #define APIENTRY WINAPI #define APIPRIVATE __stdcall #define PASCAL __stdcall yong WINAPI

[qq_36252226]

这个信息已经有了呀，提示的清清楚楚的，哪里不明白

[zgl7903]

LRESULT CALLBACK WndProc(HWND hMainwnd,UINT message,WPARAM wParam,LPARAM lParam)

[夫人的泡泡鱼]

再学习下孙鑫的视频，模拟MFC窗口的启动过程。

[我写的代码没有bug]

晕 看的有点晕