Hi Sekar,
By Setting the EditControl.ContextMenuEnabled property to false value does disable the default context menu and the hot keys that get activated are associated with the editcontrol itself. And so if you want to disable the hot keys such as Ctrl +F and etc., you need to remove the corresponding key binding using the EditControl.KeyBinder.RemoveBinding(..) method. Set custom ContextMenu as EditControl ContextMenu. Below is the sample code snippet for your reference:
// Disable the default context menu
this.editControl1.ContextMenuEnabled = false;
//this will remove CtrlF shortcut
this.editControl1.KeyBinder.RemoveBinding(Keys.Control | Keys.F);
// Set custom ContextMenu as EditControl ContextMenu
this.editControl1.ContextMenu = this.contextMenu1;
Please refer to the attached sample that illustrates the same:
http://websamples.syncfusion.com/samples/Edit/F68135/main.htmPlease try with the above details and let me know if you have any questions.
Regards,
Jisha