Popup Menus on Windows vs. Mac

[kevin]

Hi All -

I am using the "popup button" command to open a menu and on Windows you 
have to keep the mouse held down in order to select from the menu that 
"pops up". On the Mac, you only need to click the button generating the 
popup once and may then select from the menu without the need to keep 
the mouse held down. Just wondering if there is a way to replicate this 
behavior on Windows?

Cheers,

Kevin