I have managed it to get Multitouch running over VB.Net and Windows Mobile:
How it works
As you see on the drawing, the touch driver (which seems to be the "TouchGL.dll" in case of Multitouch) decides was to do. If it is a single touch just send the standard Windows Messages. But if there are 2 fingers on the screen (must be in the same moment from the beginning) it is checked wheater the app or class is in the whitelist and then the HTC_ZOOM Window Messages are send.
My App translates those HTC Window Messages to standard Mouse Window Messages. This .Net DLL does it easily for you ;) :
Private Function WndProc(ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
Select Case msg
Case ZoomBegin
Call frmMulti.pctDraw_MouseDown(New Object(), New System.Windows.Forms.MouseEventArgs(MouseButtons.Middle, 1, HiWord(lParam) - frmMulti.Left, LoWord(lParam) - frmMulti.Top, 0))
Call frmMulti.pctDraw_MouseDown(New Object(), New System.Windows.Forms.MouseEventArgs(MouseButtons.Right, 1, HiWord(wParam) - frmMulti.Left, LoWord(wParam) - frmMulti.Top, 0))
Case ZoomEnd
Call frmMulti.pctDraw_MouseUp(New Object(), New System.Windows.Forms.MouseEventArgs(MouseButtons.Middle, 1, HiWord(lParam) - frmMulti.Left, LoWord(lParam) - frmMulti.Top, 0))
Call frmMulti.pctDraw_MouseUp(New Object(), New System.Windows.Forms.MouseEventArgs(MouseButtons.Right, 1, HiWord(wParam) - frmMulti.Left, LoWord(wParam) - frmMulti.Top, 0))
Case Zooming
Call frmMulti.pctDraw_MouseMove(New Object(), New System.Windows.Forms.MouseEventArgs(MouseButtons.Middle, 1, HiWord(lParam) - frmMulti.Left, LoWord(lParam) - frmMulti.Top, 0))
Call frmMulti.pctDraw_MouseMove(New Object(), New System.Windows.Forms.MouseEventArgs(MouseButtons.Right, 1, HiWord(wParam) - frmMulti.Left, LoWord(wParam) - frmMulti.Top, 0))
End Select
Return CallWindowProc(oldWndProc, frmMulti.Handle, msg, wParam, lParam)
End Function
There are still some bugs, which have to be resolved:
-Stop auto alignment!
-Allow the fingers touch the screen seperately
Changelog:
v3 (2009-12-25)
-Now uses my Multitouch DLL
-Added another missing dll ;)
----------------
v2 (2009-12-03)
-Fix Random crashes
-Cleaned up code
-Finger following
-Gravity Ball
Please Softreset your device after installation, otherwise it will NOT work!
