Hi DaveS,
Sorry for the long delay in getting back to you.
Excel like behavior You can achieve the desired excel like behaviour by setting the ListBoxSelectionMode property of the GridGrouping Control. Below is the code snippet:
this.gridGroupingControl1.TableOptions.ListBoxSelectionMode = SelectionMode.MultiExtended;
If you left click in a cell and let up on the mouse button without moving far enough to start a drag, the mouse up event needs to put the cell into edit mode
By default, if you click a cell in GridGrouping Control, the cell is in edit mode when you release the left mouse button that is at the time of mouse up event triggering.
Kindly have a look into the sample available in the link below and please let me know if it helps:
http://websamples.syncfusion.com//samples/Grid.Windows/F72022/main.htm
Regards,
Subhasheela R