CreateFile() returning 0xffffff

[dbridle]

Hello everyone,

I hope you can help me with this issue!

I am using Extended MAPI in order to create attachments. The problem however is not with the MAPI part it is with CreateFile(). Here is the code snippet:

        vector<string> text_file;

	ifstream ifs( "c:\\Working\\output.txt" );
	string temp;

	while( getline( ifs, temp ) )
		text_file.push_back( temp );

	LPATTACH attachment;
	
	if(text_file.size() > 6)
	{
		// There are attachments
		for(int i = 6; i < text_file.size(); i++)
			{
				ULONG ulAttachNum = 0;
				LPATTACH strAttachment;
				LPSTREAM lpAttachStream;

				hr = lpMessage->CreateAttach(NULL, 0, &ulAttachNum, &attachment);
				if (FAILED(hr))
					break;

				hr = lpMessage->OpenProperty(PR_ATTACH_DATA_BIN, &IID_IStream, 0, MAPI_CREATE | MAPI_MODIFY, (LPUNKNOWN *)&lpAttachStream);
				CreateStreamOnHGlobal(NULL, TRUE, &lpAttachStream);

                                // This is the line that is not working
				HANDLE hFile = CreateFile((LPCSTR)text_file[i].c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, 0,NULL);
	
				if ( hFile != INVALID_HANDLE_VALUE) 
				{
					// alocate memory on global
					nBytes = GetFileSize( hFile, NULL);
					if ( ( hMem = GlobalAlloc( GMEM_MOVEABLE, nBytes)) != NULL) 
					{
						//read file content in global allocated mem
						if ( ( lpData = GlobalLock( hMem)) != NULL) 
						{
							ReadFile( hFile, lpData, nBytes, &nBytes, NULL);
							GlobalUnlock( hMem);
						}
					}
					::CloseHandle( hFile);
				}
				
				ULONG ulBytesWritten = 0;
				ULONG ulSize = 0;

				// Write the body to the stream
	
				hr = lpAttachStream -> Write((const void*)lpAttachStream, (ULONG)&ulSize, (ULONG*)&ulBytesWritten);

text_file is a vector, and the 6th string contains a filename (no path, the file resides in the same directory as the code). The error returned is 0xffffff. I have scoured the net and all my research suggests that what I'm doing is right, but its not working.

Can anyone see what I'm doing wrong?

Thanks in advance,

Darren

[kbw]

Call GetLastError to find out why it failed.

[dbridle]

Thanks, I did not realise that function existed, I can take it from here.

Thanks again!

Darren