Hi Alex,
Thank you for your interest in Syncfusion Products.
If your intention is to show the PopupContainer at different location when clicking the DropDown button we can use it using ComboDropDown's DropDownButton.MouseDown event. Please refer the below code snippets:
void DropDownButton_MouseDown(object sender, EventArgs e)
{ this.popupControlContainer1.ShowPopup( this.PointToScreen(new Point(100,250)));
}
Please refer the sample given below:
http://websamples.syncfusion.com/samples/Tools.Windows/F73518/main.htmPlease let me know if any concerns.
Regards,
Fathima