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static extern void mouse_event(uint dwFlags, int dx, int dy, uint dwData,

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static extern void mouse_event(uint dwFlags, int dx, int dy, uint dwData,

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Private Shared Sub mouse_event(dwFlags As UInteger, dx As UInteger, dy As UInteger, dwData As UInteger, dwExtraInfo As Integer)

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Public Declare Sub mouse_event Lib "user32" (ByVal dwFlags As Long, ByVal dx As Long, ByVal dy As Long, ByVal dwData As Long, ByVal dwExtraInfo As Long)

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Declare Function apimouse_event Lib "user32.dll" Alias "mouse_event" (ByVal dwFlags As Int32, ByVal dX As Int32, ByVal dY As Int32, ByVal cButtons As Int32, ByVal dwExtraInfo As Int32) As Boolean

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mouse_event(&H800, 0, 0, ScrollValue, 0)

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     private static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint dwData, int dwExtraInfo);

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         mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0);

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         mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);

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    static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);

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        mouse_event((int)(MouseEventFlags.LEFTDOWN), 0, 0, 0, 0);

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        mouse_event((int)(MouseEventFlags.LEFTUP), 0, 0, 0, 0);

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     Private Shared Sub mouse_event(ByVal dwFlags As UInteger, ByVal dx As UInteger, ByVal dy As UInteger, ByVal dwData As UInteger, ByVal dwExtraInfo As Integer)

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     'Public Declare Sub mouse_event Lib "user32" (ByVal dwFlags As Long, ByVal dx As Long, ByVal dy As Long, ByVal dwData As Long, ByVal dwExtraInfo As Long)

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     mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0)

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     mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0)

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    Private Declare Function apimouse_event Lib "user32" Alias "mouse_event" (ByVal dwFlags As Int32, ByVal dX As Int32, ByVal dY As Int32, ByVal cButtons As Int32, ByVal dwExtraInfo As Int32) As Boolean

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        apimouse_event(MOUSEEVENTF_WHEEL, 0, 0, increment, apiGetMessageExtraInfo)

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    Declare Auto Sub mouse_event Lib "user32" (ByVal dwFlags As Int32, ByVal dx As Int32, ByVal dy As Int32, ByVal cButtons As Int32, ByVal dwExtraInfo As IntPtr)

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    ' mouse_event moves in a coordinate system where

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    mouse_event(MOUSEEVENTF_ABSOLUTE + MOUSEEVENTF_MOVE + MOUSEEVENTF_LEFTDOWN + MOUSEEVENTF_LEFTUP, dest_x, dest_y, 0, 0)

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Per http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndotnet/html/win32map.asp , mouse_event is supposed to be replaced by .NET Framework API System.Windows.Forms.MouseEventArgs but this is not the case. MouseEventArgs is just a data structure w/out event capability. I tried to get:

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Thus I have resigned myself to unmanaged code for now. I will post the SendInput version shortly as mouse_event has been deprecated by Bill in favor of SendInput.

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Documentation

[mouse_event] on MSDN

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        public MOUSE_EVENT_RECORD MouseEvent;

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    public struct MOUSE_EVENT_RECORD

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        public MOUSE_EVENT_RECORD MouseEvent;

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    <FieldOffset(4)> Public MouseEvent As MOUSE_EVENT_RECORD

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• MOUSE_EVENT_RECORD
The MOUSE_EVENT_RECORD structure is used in a console INPUT_RECORD structure to report mouse input events.
7/17/2015 10:26:59 AM - -208.38.35.2

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    MOUSE_EVENT = &H2

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Summary

The MOUSE_EVENT_RECORD structure is used in a console INPUT_RECORD structure to report mouse input events.

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    public struct MOUSE_EVENT_RECORD

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    Public Structure MOUSE_EVENT_RECORD

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This started working once I changed the FOCUS_EVENT_RECORD to take a uint rather than a bool. Prior to that MOUSE_EVENT_RECORD.dwMousePosition.X was always 0

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Documentation

[MOUSE_EVENT_RECORD] on MSDN