windows toolbar dropdown button - post No2

Dear Dotnet Experts,

I have posted my original question a while ago, and I thought I could implement TheGhost_k8's first suggestion with ease.

Here's my post I

I have developed a window app in vs2003. On this form I have a toolbar. One of the button is of dropdown style. As it is right now, mouse clicks on the main icon area of the button will do nothing. Only clicks to its arrow down area (the narrower strip on right side) will make the dropdown menu show.

And the answer:
"instead of making dropdown style button, create a simple button and onclickevent of that button make a Context-menu/Pop-up menu APPEAR"

https://www.experts-exchange.com/questions/22045862/windows-toolbar-dropdown-button.html

However, how do I hook up my toolbar click on one button to the context menu?
Other control has this contextmenu property to let you assign a context menu, but to a toolbar, I don't want to assgin my whole toolbar to it.

Under my ToolBarButton Collection, I did not find a contextMenu property!