if the Reception
is of type ToolStripMenuItem
you can just do this :
Reception.DropDown.AutoClose = false;
You need to do that for Lab, Admin .. if you want the same effect for them.
PS : The Menu would stay open even if it loses focus. so you need to close it manually/programatically.
Alternatively (Which I think is more efficient), handle the closing event for the dropdown and cancel the closing if the CloseReason is ItemClicked
.
Reception.DropDown.Closing += new ToolStripDropDownClosingEventHandler(DropDown_Closing);
private void DropDown_Closing(object sender, ToolStripDropDownClosingEventArgs e)
{
if (e.CloseReason == ToolStripDropDownCloseReason.ItemClicked || e.CloseReason == ToolStripDropDownCloseReason.AppFocusChange)
e.Cancel = true;
}