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Pocket PC Forum / Developers / Platform Builder / July 2008Disabling system cursor in Windows CE 6.0
I'm trying to disable the system cursor as my system uses a touch screen (ELO Touch). I have removed all the mouse components (in Shell and User Interface, and USB HID) except the one in Device Drivers-Keyboard/Mouse English which has some critical dependencies. I know it was done in WinCE 4.2, but cannot achieve it in 6.0. Please advise, Dalibor The display driver is what is responsible for the cursor. Maybe that's where the problem is... Paul T. > I'm trying to disable the system cursor as my system uses a touch screen > (ELO [quoted text clipped - 7 lines] > Please advise, > Dalibor As a last resort, you might be able to use the ShowCursor( ) api in an application to control the cursor. In CE 5.0, I use the following: // enable cursor - true causes increment, ShowCursor must be >= 0 to be On while( ShowCursor(true) < 0 ); and // disable cursor - false causes decrement, ShowCursor must be < 0 to be Off while( ShowCursor(false) >= 0 ); > The display driver is what is responsible for the cursor. Maybe that's > where the problem is... [quoted text clipped - 12 lines] > > Please advise, > > Dalibor Sorry for the delayed response. I was trying to get attention from the chip manufacturer who owns the driver source and was pointed by them towards the board manufacturer, with no response at all. So we have tried to do the fix on the application level as Bill has suggested, but it was not working reliably, the cursor would turn back on. Only after implementation of following combination it works: WNDCLASS wc; wc.hCursor = LoadCursor(NULL, IDC_ARROW); SetCursor(NULL); We are working with ICOP VG86 platform. > As a last resort, you might be able to use the ShowCursor( ) api in an > application to control the cursor. In CE 5.0, I use the following: [quoted text clipped - 23 lines] > > > Please advise, > > > Dalibor Changing/hiding the cursor off is an application-specific operation. You should not have control over the cursor when it's over another application, so you don't. That is, what you're trying to do is the equivalent of Internet Explorer taking over the cursor when Word is in front. That's not what you want and the system prevents you from doing that, or at least makes every effort to prevent you from doing it. Paul T. > Sorry for the delayed response. I was trying to get attention from the > chip [quoted text clipped - 43 lines] >> > > Please advise, >> > > Dalibor Paul, We run only one application after the WinCE boot, with no possibility to switch out of it, so it works in this case. Of course I would prefere to fix the driver and disable the cursor on the system level. > Changing/hiding the cursor off is an application-specific operation. You > should not have control over the cursor when it's over another application, [quoted text clipped - 52 lines] > >> > > Please advise, > >> > > Dalibor Yes, you have a safe case there. You tried ShowCursor( FALSE )? Paul T. > Paul, > [quoted text clipped - 67 lines] >> >> > > Please advise, >> >> > > Dalibor Yes, we did, but the cursor would come back again. The LoadCursor holds the setting for the given application reliably even if you switch to another application and come back. Dalibor > Yes, you have a safe case there. You tried ShowCursor( FALSE )? > [quoted text clipped - 71 lines] > >> >> > > Please advise, > >> >> > > Dalibor But, if you don't ever switch away from your application... ;-) Paul T. > Yes, we did, but the cursor would come back again. The LoadCursor holds > the [quoted text clipped - 92 lines] >> >> >> > > Please advise, >> >> >> > > Dalibor |
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