DWORD MyGetProAddress( HMODULE phModule,char* pProcName )
{
if (!phModule) return 0;
PIMAGE_DOS_HEADER pimDH = (PIMAGE_DOS_HEADER)phModule;
PIMAGE_NT_HEADERS pimNH = (PIMAGE_NT_HEADERS)((char*)phModule+pimDH->e_lfanew);
PIMAGE_EXPORT_DIRECTORY pimED = (PIMAGE_EXPORT_DIRECTORY)((DWORD)phModule+pimNH->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
DWORD pExportSize = pimNH->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
DWORD pResult = 0;
if ((DWORD)pProcName < 0x10000)
{
if ((DWORD)pProcName >= pimED->NumberOfFunctions+pimED->Base || (DWORD)pProcName < pimED->Base) return 0;
pResult = (DWORD)phModule+((DWORD*)((DWORD)phModule+pimED->AddressOfFunctions))[(DWORD)pProcName-pimED->Base];
}
else
{
DWORD* pAddressOfNames = (DWORD*)((DWORD)phModule+pimED->AddressOfNames);
for (unsigned long i=0;i < pimED->NumberOfNames ; i++)
{
char* pExportName = (char*)(pAddressOfNames[i]+(DWORD)phModule);
//if (pExportName[0]=='L')
{
if (Mystrcmp(pProcName,pExportName) == 0)
{
WORD* pAddressOfNameOrdinals = (WORD*)((DWORD)phModule+pimED->AddressOfNameOrdinals);
pResult = (DWORD)phModule+((DWORD*)((DWORD)phModule+pimED->AddressOfFunctions))[pAddressOfNameOrdinals[i]];
break;
}
}
}
}
if (pResult != 0 && pResult >= (DWORD)pimED && pResult < (DWORD)pimED+pExportSize)
{
char* pDirectStr = (char*)pResult;
BOOL pstrok = FALSE;
while (*pDirectStr)
{
if (*pDirectStr == '.')
{
pstrok = TRUE;
break;
}
pDirectStr++;
}
if (!pstrok) return 0;
char pdllname[MAX_PATH];
int pnamelen = pDirectStr - (char*)pResult;
if (pnamelen <= 0) return 0;
memcpy(pdllname,(char*)pResult,pnamelen);
pdllname[pnamelen] = 0;
HMODULE phexmodule = GetModuleHandle(pdllname);
pResult = MyGetProAddress(phexmodule,pDirectStr+1);
}
return pResult;
}
int main()
{
char szText[64] = "Hello world!";
char szText2[64] = {0};
printf("%d\r\n", Mystrlen(szText));
Mystrcpy(szText2, szText);
printf("%s\r\n", szText2);
Mystcat(szText2, "1234");
printf("%s\r\n", szText2);
printf("%d\r\n", Mystrcmp("abc", "aBc"));
return 0;
}
