asked on

SetCursorPos function (User32) question.

I'm having a small problem with SetCursorPos... whenever I call it, it seems to just set my cursor the 0,0. That's all it does... here's my code:

In General - Declarations:

Private Type Point
X As Long
Y As Long
End Type
Private Type Rect
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type

Private Declare Function GetCursorPos Lib "User32" (ByRef ptPoint As Point) As Boolean
Private Declare Function SetCursorPos Lib "User32" (ByRef X, Y As Integer) As Boolean
Private Declare Function ClipCursor Lib "User32" (ByRef Rectangle As Rect) As Boolean

--------------------------------------------------------------------------------------

Private Sub Command1_Click()
Dim MyRect As Rect
Dim HoldX, Temp
Dim ptMouse As Point

MyRect.Left = 0
MyRect.Top = 0
MyRect.Right = 800
MyRect.Bottom = 600
ClipCursor MyRect
GetCursorPos ptMouse
HoldX = CVar(ptMouse.X + 100)
Do Until ptMouse.X = HoldX
ptMouse.X = ptMouse.X + 1

Loop
SetCursorPos CInt(HoldX), CInt(ptMouse.Y)
End Sub

--------------------------------------------------------------------------------------

Oh, by the way... I'm using VB 5.0, programming in Win 95. Screen resolution is set to 800 x 600. Any ideas ladies and gentlemen? If so, please let me know A.S.A.P. Thank you!

---LSILes
les@livingscriptures.com

nietod

I'm not sure of hte VB syntax, but it looks like you are passing the X and Y values by reference. They should be passed by value.

LSILes

ASKER

Good thought... that did occur to me before I asked the question, and I tried it, but I found out that it can only be passed ByRef. I would change it, but again, it's a User32 function, so I have no idea how to. The message I get when I did try to change it to ByVal was:

Run-time error '49':

Bad DLL calling convention

And it ends the program for me. Have any more ideas? Or should I use something other than ByVal? Please let me know... thanks!

---LSILes
les@livingscriptures.com

nietod

The problem probly is both the reference part AND the fact that you specify them as integers not long (I'm guessing here, but is an integer 16 bits? these should be 32 bits.) Try passing them by value and as long.

By the way I'm not answering this becuase I'm leaving town for a few days and hate to lock a question and dissappear.

MikeP090797

This is the correct declaration of SetCursorPos:

Declare Function SetCursorPos Lib "user32" Alias "SetCursorPos" (ByVal x As Long, ByVal y As Long) As Long

LSILes

ASKER

Works for me... just send it to me as an answer and it's all yers! Thanks!

---LSILes
les@livingscriptures.com

ASKER CERTIFIED SOLUTION

MikeP090797

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

LSILes

ASKER

Thanks Mike!

---LSILes
les@livingscriptures.com