I Create a Windows Forms application with C#.
I have a general Form and a panel on it.
I show subForm into this panel with code:
SubForm objF
As I understand, you're very close. To add another form into subform try the same code instead:
subform
pnlSubSystem.Controls.Add(objForm);
use (where objForm2 is the new subForm)
objForm2
subForm
SubForm objForm2 = new SubForm(); objForm.Controls.Add(objForm2);