how tow show form(vb6) in C# as mdi child?

thanks for your advice. but i can't make it as ActiveX Control. now i can use setparent(api function) to make vb6-form show as child in c# parent;but how to make it as mdi-child form?

Not sure I really understand what you're trying to do. I'll take a guess... You have a form in VB6, and don't won't to re-write it in C#? If that's the case, I guess you could make an ActiveX control and then include that into your C# project, I guess. All though, I would not personally do that since I try and avoid COM now. John...