Setting Mouse Position with SetCursorPos

I am attempting to set the position of the mouse to set coords in another window. I have been able to set the position by using SetCursorPos but for some reason I cannot get it to set the position in the other window. I am pretty sure I need to set the window by using the ClietToScreen() yet I am not able to get it to work. I am using the following code

Code:

---

    Private Declare Function ClientToScreen Lib "user32" (ByVal hwnd As IntPtr, _
    ByVal lpPoint As POINTAPI) As Integer

    Private Declare Function SetCursorPos Lib "user32" (ByVal x As Integer, _
        ByVal y As Integer) As Integer

    Private Structure POINTAPI
        Dim X As Long
        Dim Y As Long
    End Structure

---

Code:

---

        Dim pt As POINTAPI

        pt.X = txtX.Text
        pt.Y = txtY.Text
        ClientToScreen(myHandle, pt)
        SetCursorPos(pt.X, pt.Y)

---

I have also tried varriations of this:

Code:

---

        Dim pt As POINTAPI

        ClientToScreen(myHandle, pt)
        pt.X = pt.X + txtX.Text
        pt.Y = pt.Y + txtY.Text
        SetCursorPos(pt.X, pt.Y)

---

I have the correct handle for the window (tried both as Integer and IntPtr) when I try the program with out the ClientToScreen function the mouse is moved to the coords based on my desktop, not on the window whos handle I pass. If I use the Integer or IntPtr it erros out with (Additional information: Object reference not set to an instance of an object)

Any help would be appreciated,
Patrick

You don't need to use Win32 API calls to do either of those function calls in with the .NET Framework. Just use the following code:

Code:

---

Dim myPoint As New Point(100, 100)
myPoint = Form1.PointToScreen(myPoint)
System.Windows.Forms.Cursor.Current.Position = myPoint

---

That does seem to be a better way to move the mouse cursor. The problem I am having is that I am trying to move the cursor to a point relative to a seperate window.

I am attempting to find out where the window(the window of another program such as winamp) resides on the desktop. I know that the position I want my mouse to be at is 100, 100 in from the top left corner of the winamp window. Because I am trying to find the location of the winamp window it needs to be variable in case the winamp window moves.

If you know how to find the coords of a certain windows application I can use the code above to move the mouse.

Thanks,
-P

You can get the position of a window with the GetWindowRect function.

http://pietschsoft.com/programming/v...indowrect.html

Code:

---

Dim myPoint As New Point(100, 100)
myPoint = Form1.PointToScreen(myPoint)
System.Windows.Forms.Cursor.Current.Position = myPoint

---

That code doesn't work crpietschmann. :(

The bolded section returns the error "Reference to a non-shared member requires an object reference."

Are you sure Form1 is an object?