Sent when the user presses the mouse button while the mouse pointer is in the backdrop.
# Metadata
Platforms: desktop, server OS: mac, windows, linux Introduced: 1.1 Security:
# Syntax
mouseDownInBackdrop pButtonNumber
# Params
- pButtonNumber : Specifies which mouse button was pressed:
# Examples
on mouseDownInBackdrop -- show a popup menu with a list of windows popup button "Windows" end mouseDownInBackdrop
# Description
Handle the mouseDownInBackdrop message to perform an action when the user presses the mouse button while the mouse pointer is outside any window.
The mouseDownInBackdrop message is sent to the current card.
If the backdrop property is set to "none", the mouseDownInBackdrop message is not sent.
# Tags
ui,
# See
- **property:** backdrop - **glossary:** property, mouse button, mouse pointer, message, current card - **message:** mouseUpInBackdrop