第一次编windows程序，求解！

Question

#include <windows.h>LPRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
static TCHAR szAppName[]=TEXT("HelloWin");
static TCHAR szClassName[]=TEXT("HelloWinClass");
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 = szClassName;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL,TEXT("This program requires Windows NT!"),szAppName,MB_ICONERROR);
return 0;
}
hwnd = CreateWindow(szClassName,TEXT("The HelloWin Program"),WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,nCmdShow);
UpdateWindow(hwnd); while (GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}LPESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC  hdc;
PAINTSTRUCT  ps;
RECT rect; switch(message)
{
case WM_CREATE:
MessageBox(NULL,"Creating... ...","HelloWin Message:",MB_OK);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd,&ps);
GetClientRect(hwnd,&rect);
DrawText(hdc,TEXT("Hello,Windows 98!"),-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);
}Compiling...
test.cpp
K:\studyII\MyProjects\Windows\test.cpp(3) : error C2143: syntax error : missing ';' before '__stdcall'
K:\studyII\MyProjects\Windows\test.cpp(3) : error C2501: 'LPRESULT' : missing storage-class or type specifiers
K:\studyII\MyProjects\Windows\test.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
K:\studyII\MyProjects\Windows\test.cpp(40) : error C2143: syntax error : missing ';' before '__stdcall'
K:\studyII\MyProjects\Windows\test.cpp(40) : error C2501: 'LPESULT' : missing storage-class or type specifiers
Error executing cl.exe.