The status of mouse buttons

The status of mouse buttons

Visual Basic lets you test the state of mouse buttons only inside a MouseDown, MouseMove, or MouseUp event procedure. To determine the current state of mouse buttons you can use one of the following functions:

Private Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Long) As _    IntegerFunction LeftButton() As Boolean    LeftButton = (GetAsyncKeyState(vbKeyLButton) And &H8000)End FunctionFunction RightButton() As Boolean    RightButton = (GetAsyncKeyState(vbKeyRButton) And &H8000)End FunctionFunction MiddleButton() As Boolean    MiddleButton = (GetAsyncKeyState(vbKeyMButton) And &H8000)End Function

If you prefer, you can use the following function, which returns the state of all three buttons as a bit-coded field, in the same format as the Button argument passed to mouse event procedures:

Function MouseButton() As Integer    If GetAsyncKeyState(vbKeyLButton) < 0 Then        MouseButton = 1    End If    If GetAsyncKeyState(vbKeyRButton) < 0 Then        MouseButton = MouseButton Or 2    End If    If GetAsyncKeyState(vbKeyMButton) < 0 Then        MouseButton = MouseButton Or 4    End IfEnd Function

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