i use

arg.button==( MouseButtons.Left+MouseButtons.Right)

but the system promote the the type cant +

who can help me ~

Hi there,
have you tried using the "bitwise or" operator (|) instead?

According to MSDN (look for "MouseButtons Enumeration"):

"Specifies constants that define which mouse button was pressed.
This enumeration has a FlagsAttribute attribute that allows a bitwise
combination of its member values."


Good luck!

-Matteo

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