VC++实现通过API来查看程序错误信息的方法

if((m_hBitMap=(HBITMAP)::LoadImage(NULL,filepath,IMAGE_BITMAP,0,0,LR_DEFAULTSIZE|LR_LOADFROMFILE))==NULL)
{
LPVOID lpMsgBuf;
DWORD dw = ::GetLastError(); 
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | 
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&lpMsgBuf,
0, NULL );
//显示出错信息并退出处理程序
::MessageBox(NULL,(LPCTSTR)lpMsgBuf,TEXT("ERROR"),MB_ICONERROR); 
LocalFree(lpMsgBuf);
return;
}
if((m_hBitMap=(HBITMAP)::LoadImage(NULL,filepath,IMAGE_BITMAP,0,0,LR_DEFAULTSIZE|LR_LOADFROMFILE))==NULL)
{
LPVOID lpMsgBuf;
DWORD dw = ::GetLastError(); 
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | 
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&lpMsgBuf,
0, NULL );
//显示错误信息并退出处理进程
::MessageBox(NULL,(LPCTSTR)lpMsgBuf,TEXT("ERROR"),MB_ICONERROR); 
LocalFree(lpMsgBuf);
return;