Opening A Form using Reflection

[Tristan Rhodes]

I've written a little program that creates a form using reflection, however, when I attempt to show this form, it throws an error: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ComponentModel.Win32Exception: Class already exists at System.Windows.Forms.WindowClass.RegisterClass() at System.Windows.Forms.WindowClass..ctor(String className, Int32 classStyle) at System.Windows.Forms.WindowClass.Create(String className, Int32 classStyle) at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp) at System.Windows.Forms.Control.CreateHandle() at System.Windows.Forms.Form.CreateHandle() at System.Windows.Forms.Control.get_Handle() at System.Windows.Forms.Control.SetVisibleCore(Boolean value) at System.Windows.Forms.Form.SetVisibleCore(Boolean value) at System.Windows.Forms.Control.set_Visible(Boolean value) at System.Windows.Forms.Control.Show() the only other form that exists is my primary application form. Does anyone know what causes this? Cheers Cata

[leppie]

Did you add the control to the Form? Is the bounds/size/visible set correctly? xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots

[Tristan Rhodes]

It's just a blank form, default constructor variables. Nothing added.

[Dave Kreskowiak]

Try posting the code your using to do this. We can't tell what you did from the Exception, but the Exception message does help. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

[leppie]

Well thats what Im asking you! If you dont add a control to the Form it will never show. You dont need to call show on it. Just add it. xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots

[Tristan Rhodes]

Sorry, i think i made a slight mistake. I was trying to construct a base form. Rather than an inherited one. It caused problems. Will make sure i don't try that again :) Cata

[afinnell]

It appears in this context the 'Class' means that the form attempted to register a new 'Class' (Description of a window) with the Win32 API RegisterClass. I do think posting the code might help. - Drew