利用DbgHelp获取导出函数信息

#include "stdafx.h"
#include <Windows.h>
#include <imagehlp.h>
#include <locale.h>
#pragma comment(lib,"DbgHelp.lib")

BOOL CALLBACK CallBackProc( PSYMBOL_INFO pSymInfo, ULONG SymbolSize, PVOID UserContext )
{
printf( "函数名: %s\r\n地址: %08X \r\n\r\n", pSymInfo->Name, pSymInfo->Address );
return TRUE;
}

char* UnicodeToAnsi( const wchar_t* szStr, char* szDest )
{
int nLen = WideCharToMultiByte( CP_ACP, 0, szStr, -1, NULL, 0, NULL, NULL );
if ( nLen == 0 )
{
return NULL;
}
char* pResult = new char[nLen];
WideCharToMultiByte( CP_ACP, 0, szStr, -1, pResult, nLen, NULL, NULL );
strcpy( szDest, pResult );
delete pResult;
return szDest;
}

BOOL GetSymbol( LPCTSTR FileName )
{
HANDLE hProcess = OpenProcess( PROCESS_ALL_ACCESS, FALSE, GetCurrentProcessId() );
CloseHandle( hProcess );

if ( !SymInitialize( hProcess, NULL, FALSE ) )
{
return FALSE;
}

DWORD dwOpt = SymGetOptions();
SymSetOptions( dwOpt | SYMOPT_DEFERRED_LOADS | SYMOPT_UNDNAME | SYMOPT_CASE_INSENSITIVE );

char sFileName[MAX_PATH] = {0};
UnicodeToAnsi( FileName, sFileName );
DWORD64 dwSymModule = SymLoadModuleEx( hProcess, NULL, sFileName, NULL, 0, 0, NULL, 0 );

if ( 0 == dwSymModule )
{
SymCleanup( hProcess );
return -1;
}

if ( !SymEnumSymbols( hProcess, dwSymModule, 0, ( PSYM_ENUMERATESYMBOLS_CALLBACK )CallBackProc, NULL ) )
{
SymCleanup( hProcess );
return -1;
}

return SymCleanup( hProcess );
}

int _tmain( int argc, _TCHAR* argv[] )
{
const TCHAR* sDllPath = _T( "C:\\Windows\\System32\\WS2_32.DLL" );
if ( !GetSymbol( sDllPath ) )
{
return -1;
}
getchar();
return 0;
}