dotnet windows forms designtime: I create a new control (derived from Control, not UserControl).

The OnPaint method is driven by application data. In other words when the
application is running it passes the data to the control, and the control
does the painting. When I drag the control to a form in the VS designer,
that data has not yet been supplied, so VS throws a nullReference exception.
(VS draws a white box with a red border and X)

Can someone suggest a solution?

Thanks

Mitch

* "Mitch" <xxxxx@avantium.com> scripsit:
[quoted text, click to view]

Inside the 'OnPaint' method, check 'Me.DesignMode' and draw the data only
if it returns 'False'.

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>