Board index » Visual Studio » Control that adds properties to other controls

Visual Studio47
Can anybody tell me how to make a user control add properties to other

controls (e.g. like when the ToolTip control adds a ToolTip on ToolTip1

property to the other visual controls)?



Cheers

Johnny J.


-

Check out the title Extender Providers towards the bottom of the page.



samples.gotdotnet.com/quickstart/winforms/doc/WinFormsCreatingControls.aspx">samples.gotdotnet.com/quickstart/winforms/doc/WinFormsCreatingControls.aspx









"Johnny Jörgensen" <jojo@altcom.se>wrote in message



-

Thanks Ray,



I have now found out how to add the propery to different control types, and

it works like a charm. I've got one small problem, though:



My control is inherited from a normal System.Windows.Forms.Button, and I

want the control to add the property to other types of controls, but also to

other Button controls, but not my own inherited button control.



I try to check for that in my code:



Function CanExtend(ByVal target As Object) As Boolean Implements

IExtenderProvider.CanExtend

Dim bReturn As Boolean = False



If TypeOf target Is Control Then



If TypeOf target Is TextBox Then bReturn = True



If TypeOf target Is Button and Not TypeOf target Is Me Then bReturn =

True



End If



Return bReturn



End Function





That doesn't work, the property is even added to my own control. Neither

does this work:



Function CanExtend(ByVal target As Object) As Boolean Implements

IExtenderProvider.CanExtend

Dim bReturn As Boolean = False



If TypeOf target Is Control And Not TypeOf target Is MyButtonType Then



If TypeOf target Is TextBox Then bReturn = True





If TypeOf target Is Button and not(TypeOf target Is Me) Then bReturn =

True



End If



Return bReturn



End Function







What am I doing wrong?



Cheers,

Johnny J.











"Ray Cassick" <rcassick@enterprocity.com>wrote in message



-