Either: Register your .NET code for COM Interop, then invoke it through COM. This is the easier method. Or: Use the .NET hosting interfaces to load the CLR into your process, then load the appropriate .NET code. This is the hard way. For .NET 1.1, see C:\Program Files\Microsoft Visual Studio .NET 2003\SDK\v1.1\Tool Developers Guide\docs\Hosting Interfaces.doc. For .NET 2.0, see 'Hosting Interfaces for .NET Framework version 2.0' in MSDN Library, or online here[^]. Stability. What an interesting concept. -- Chris Maunder

anless change name of base class from CDialog to CPropertyPage u need to change in macross to (IMPLEMENT_DYNAMIC(..., CPropertyPage) and in BEGIN_MESSAGE_MAP(..., CPropertyPage) and change anywhere in code where is use base class :) After that u must create object from CPropertySheet to wich you add your dialogs .... and it wil work :)

You could always derive PayrollDlg and WageDlg from a common class where AbsSocket is a member variable. "When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Your first function, waveOutOpen((HWAVEOUT*)&hWaveOut,WAVE_MAPPER,(tWAVEFORMATEX*)&PCMWaveFmtRecord,NULL,NULL,NULL); seems to be correctly, but more correctly is to use function like that: HWAVEOUT hWaveOut; waveOutOpen(&hWaveOut,WAVE_MAPPER,(LPWAVEFORMATEX)&PCMWaveFmtRecord,NULL,NULL,NULL); (where PCMWaveFmtRecord identifies the format of the waveform-audio data to be sent to the device). The second and third function: waveOutPrepareHeader((HWAVEOUT)&hWaveOut,&WaveHeader,sizeof(WaveHeader)); waveOutWrite((HWAVEOUT)&hWaveOut,&WaveHeader,sizeof(WaveHeader)); is not correctly because the first parrametter pased is need to be a HWAVEOUT handle and not a reference. Correctly is: waveOutPrepareHeader(hWaveOut,&WaveHeader,sizeof(WAVEHDR)); waveOutWrite(hWaveOut,&WaveHeader,sizeof(WAVEHDR));