Custom int style property - An unhandled exception of type ''System.ArgumentOutOfRangeException'' occurred in Syncfusion.Grid.Windows.dll

Firstly my specs: mc++ developed in VS 2005 version 8 .NET 2.0.5072 Win Xp SP 2 Essential Grid 4.1.0.62 Secondly my problem: I am trying to add a custom style property to cells in my grid. I have extended the GridStyleInfoCustomProperties object as in the examples. I want to add an int property called Master. I have attached the files which extend the property object. Initially (the default) the Master os set to 0 and this works fine. If I subsequently set the Master property externally to a vaule other than 0 then this appears to work fine (i''ve not checked them all ;-) ). However, if I try to set the Master property to 0 then an ArgumentOutOfRangeException error is thrown by the Syncfusion.Grid.Windows.dll. The exact text is: ------------------------------------------ An unhandled exception of type ''System.ArgumentOutOfRangeException'' occurred in Syncfusion.Grid.Windows.dll Additional information: Specified argument was out of the range of valid values. ------------------------------------------- Is this related to the fact that 0 is being treated as a null pointer somewhere or is this a known bug or ?????? Any help or hints gratefully welcomed, Colin

example11.zip

An update. It seems that I was misled when thinking that using a value other than 0 would work and that this appears to have been a freak case which I can not repeat. This leads me to suspect that I have not implemented the property correctly, although I think it is all as it should be. Can anyone stop the mistake?? Colin

Ah, user error I think! Having swapped the row and col numbers round i was trying to set a style property which did not exist, in which case the error makes more sense! This is what you get for being tired and working on a friday afternoon.