1>.\wincedll.cpp(55) : error C2731: 'WinMain' : function cannot be overloaded
1> .\wincedll.cpp(49) : see declaration of 'WinMain'

主管要我把一个 exe 的功能 封装到一个 show{}函数中，并放入dll, show{}函数 只有1个参数（打开文件路径）
我照下面改了，但是我发现 winmain 的那4个参数不知道如何是好

#include "stdafx.h"
#include "htmlctrl.h"
#include "resource.h"

#pragma comment(lib,"htmlview")

// forward defines (instead of using string tables) 
#define IDS_APP_TITLE TEXT("Browse")
//用本地文件进行测试 file://\\Program Files\\Browse\\start.html
#define IDS_START_PAGE TEXT("http://www.baidu.com/")
#define WM_LAUNCHBROWSER (WM_USER + 1)
// Global Variables:
HINSTANCE g_hInst; // The current instance

// Forward declarations of functions  
ATOM MyRegisterClass(
HINSTANCE,
LPTSTR
);
BOOL InitInstance(
HINSTANCE,  
int
);
LRESULT CALLBACK WndProc(
HWND,
UINT,
WPARAM,
LPARAM
);

BOOL APIENTRY DllMain( HANDLE hModule, 
  DWORD ul_reason_for_call, 
  LPVOID lpReserved
)
{
  return TRUE;
}

//
// FUNCTION: WinMain()
//
// PURPOSE: Entry point for the application and sets up the Msg loop
//
int WinMain( 
HINSTANCE hInstance,
HINSTANCE hPrevInstance
//LPTSTR lpCmdLine,
//int nCmdShow
)
{
MSG msg;

// Perform application initialization:
if (FALSE == InitInstance (hInstance, nCmdShow))  
{
return FALSE;
}

// Main Msg loop:
while (GetMessage(&msg, NULL, 0, 0))  
{
TranslateMessage(&msg);
DispatchMessage(&msg); 
}

return msg.wParam;
}

//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(
HINSTANCE hInstance,  
LPTSTR szWindowClass
)
{
WNDCLASS wc;

  wc.style = CS_HREDRAW | CS_VREDRAW;
  wc.lpfnWndProc = (WNDPROC) WndProc;
  wc.cbClsExtra = 0;
  wc.cbWndExtra = 0;
  wc.hInstance = hInstance;
  wc.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WINCE));
  wc.hCursor = 0;
  wc.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
  wc.lpszMenuName = 0;
  wc.lpszClassName = szWindowClass;

return RegisterClass(&wc);
}

//
// FUNCTION: InitInstance(HANDLE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(
HINSTANCE hInstance,  
int nCmdShow
)
{
HWND hWnd = NULL;

g_hInst = hInstance; // Store instance handle in our global variable

//If it is already running, then focus on the window
hWnd = FindWindow(IDS_APP_TITLE, IDS_APP_TITLE); 
if (NULL != hWnd)  
{
SetForegroundWindow (hWnd);
return FALSE;
}  

MyRegisterClass(hInstance, IDS_APP_TITLE);

RECT rect;
GetClientRect(hWnd, &rect);

// create a full-screen window for the browser control
hWnd = CreateWindow(IDS_APP_TITLE, IDS_APP_TITLE, WS_VISIBLE,
0,0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN),  
NULL, NULL, hInstance, NULL);
if (NULL == hWnd)
{ 
return FALSE;
}

// Hide all the Shell parts and show the window in full screen mode.
SHFullScreen(hWnd, SHFS_HIDETASKBAR | SHFS_HIDESTARTICON | SHFS_HIDESIPBUTTON);

ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);

return TRUE;
}

//
// FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
// PURPOSE: Processes messages for the main window.
//
// WM_NOTIFY - Handle specific system notifications
// WM_CREATE - This code runs when the app starts
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit Msg and return
// WM_LAUNCHBROWSER - This code starts the browser control and loads a start page
//
//
LRESULT CALLBACK WndProc(
HWND hWnd,  
UINT Msg,  
WPARAM wParam,  
LPARAM lParam)
{
WCHAR wszURL[1000];
  HWND hWndHtml;

switch (Msg)  
{
case WM_NOTIFY:
  {
NM_HTMLVIEW* pnmHTMLView = (NM_HTMLVIEW*)lParam;

  switch (pnmHTMLView->hdr.code)
  {
  // this code is processed when a user clicks on a hyperlink
case NM_HOTSPOT:
  // read the target string
mbstowcs(wszURL, (const char *)pnmHTMLView->szTarget, 1000);

// if the link is just "exit", then exit
if(wcscmp(wszURL, L"exit") == 0)
{
PostMessage(hWnd, WM_CLOSE, NULL, NULL);
  // Returning TRUE indicates that we have handled the Msg
  // and the control will not do its default processing.
  return TRUE;
}
break;
} 
}
  // Returning FALSE indicates to the html control that it should do
  // the default processing.
return FALSE;

case WM_CREATE:
// launch the browser control on startup
PostMessage(hWnd, WM_LAUNCHBROWSER, NULL, NULL); 
break;

case WM_DESTROY:
PostQuitMessage(0);
break;

case WM_LAUNCHBROWSER:

// the only function call required to create a browser control instance
if (TRUE == InitHTMLControl(g_hInst))
{
// create the window for the control
hWndHtml = CreateWindow(TEXT("DISPLAYCLASS"), NULL, WS_VISIBLE, 0, 0,  
GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN),  
hWnd, NULL, g_hInst, NULL);
ShowWindow(hWndHtml, SW_SHOW);
UpdateWindow(hWndHtml);

// load the start page into the browser window
SendMessage(hWndHtml, DTM_NAVIGATE, 0, (LPARAM)(LPTSTR)IDS_START_PAGE); 
}
else
{
MessageBox(hWnd, TEXT("Unable to Launch Browser"), TEXT("Browser Control Problem:") , NULL);
DestroyWindow(hWnd);
}
break;

default:
return DefWindowProc(hWnd, Msg, wParam, lParam);
}
return 0;
}

int WinMain(  
HINSTANCE hInstance,
HINSTANCE hPrevInstance
//LPTSTR lpCmdLine,
//int nCmdShow
)
去掉以上2个注释

估计是第三个参数的问题，你改为 LPSTR 应该就OK了