Invisible Mouse

How do i make the mouse invisible for my program? I runs at full screen.

See your other thread

You can use the ShowCursor() API, but a more simple solution is to create a cursor "NOTHING.CUR" with nothing in it. Apply it in the Windows Configuration Screen\Mouse and your mousie will be no longer visible!

Quote:

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Originally posted by Mad Compie
You can use the ShowCursor() API, but a more simple solution is to create a cursor "NOTHING.CUR" with nothing in it. Apply it in the Windows Configuration Screen\Mouse and your mousie will be no longer visible!

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I don't have that cursor, but why would you want to make it totally invisible? That'll screw you up a lot because you won't know where the mouse pointer is. The best time to use the ShowCursor() Api should only be used for a screen saver, or your form only. Anything else and that would definitly irriatate or piss (can I say that?) someone off.

Well, ClipCursor does the trick

Code:

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'In a module
Declare Function ShowCursor Lib "user32" (ByVal bShow As Long) As Long
Declare Function ClipCursor Lib "user32" (lpRect As Any) As Long

Property Let MouseVisible(newval As Boolean)
Dim TRect1 As RECT
    Select Case newval
        Case False 'To disable the mouse
            With TRect1
                .Left = 0: .Top = 0: .Right = 1: .Bottom = 1
            End With
            ClipCursor TRect1
            ShowCursor False
        Case True 'To enable the mouse
            ClipCursor 0
            ShowCursor True
    End Select
End Property
'in code
'To disable
MouseVisible = False
'to get mouse back
MouseVisible = True

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All you need is this:

Code:

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'Make it visible
ShowCursor 1

'Make it invisible
ShowCursor 0

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The ShowCursor() API is only usefull in a certain application. If Windows enters the Standby-Suspend modus, the cursors appears again!
The NULL.CUR cursor is indeed interesting if you are using an embedded PC, with a touch panel (like in a kiosk, the user don't really want to see the cursor...)

The thing with Clipcursor is, that you don't click around on stuff when you don't see the cursor. So by setting the rect to the topleft corner you can't click on anything hazardous

When you call ShowCursor you are actually incrementing (if you pass True) or decrementing (if you pass False) the internal display counter by one.
So if you call ShowCursor(False) twice you have to call ShowCursor(True) twice to show the cursor again.
So you should always check the return value of ShowCursor. If the return value is less then zero the mouse pointer is hidden and if the return value is zero or above the cursor is visible.
The internal display counter is set to zero at system startup if a mouse is present, otherwise it's set to -1.

Good point Joacim, so here's how it should look like

Code:

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Declare Function ShowCursor Lib "user32" (ByVal bShow As Long) As Long

Property Get CursorVisible() As Boolean
    CursorVisible = -ShowCursor(True)
    ShowCursor (False)
End Property
Property Let CursorVisible(Newvalue As Boolean)
    Do While ShowCursor(Newvalue) * Sgn(Newvalue + 0.5) > 0
    Loop
End Property

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