SetParent() between C# form and C++ window

[tmjiang]

Good day,

I'm trying to set a C# form as a child to a C++ window.
The C++ window is constructed by CreateWindowEx.
The C# form returns its handle through managed C++, and its style is
set to WS_CHILD before SetParent().

After SetParent(hndCSharpAsChild, hndCPPAsParent), the C# form
disappears.

I'm not sure if this problem were related to
http://groups.google.com/group/microsoft.public.dotnet.framework.windowsforms/msg/8dfba1efcbee169b
http://groups.google.com/group/microsoft.public.dotnet.framework.windowsforms/msg/0eb7c9c87d33ad9a
or not.

BTW, when I reverse the relationship between C# form and C++ window,
both of them work fine.

Sincerely,
Mike

 

[tmjiang]

Is it because that SetParent() can only work for MDI applications?
That is, if my parent window do not have that kind of characteristics,
it can not have a child window of C# form.
On the other hand, if I set the style of C# form to WS_POPUP, not only
itself disappears, but the parent C++ window does.

When I was using CreateWindowEx between 2 C++ windows, there seems to
be not so many restrictions.