Hey, I had gotten a book a while ago to set up a direct input mouse, but the mouse position is given in relative position. The book showed how to set the position to absolute, but its so inaccurate. For example, If I have mouse on the left side of the screen, and its at position 0 and move it the right side when int 1024x768 resolution, the mouse position should be at 1023 then. But with direct input its different every time, its so inprecise. It usually ends up saying it only moved like 1/2 to 1/3 of the actually amount it moved. In that example, it would usually say on the rigth side it was only x position 500 to 800, not 1023. I know how to use the windows mouse coordinate system, that returns the real true precise mouse coordinates, but if you hit a keyboard key, it screws that mouse position up. So I checked in directX 7 SDK, and found something about ABS position, but I can never understand that SDK, they do such a horrible job of explaining stuff. Here is what i have for my DI Mouse set up currently: /////////////////////////////////////////////////////////// //---- DIRECT INPUT MOUSE SETUP----// if(lpDI->CreateDevice(GUID_SysMouse, &pMouse, NULL) != DI_OK) { ErrStr = Err_CreateMouse; return FALSE; } if(pMouse->SetDataFormat(&c_dfDIMouse) != DI_OK) { SafeRelease(pMouse); return FALSE; } if(pMouse->SetCooperativeLevel(hWnd, DISCL_FOREGROUND / DISCL_NONEXCLUSIVE) != DI_OK) { SafeRelease(pMouse); return FALSE; } if(pMouse->SetEventNotification(CreateEvent(0, 0, 0, 0)) != DI_OK) { SafeRelease(pMouse); return FALSE; } DIPROPDWORD dipdw = { {sizeof(DIPROPDWORD), sizeof(DIPROPHEADER), 0, DIPH_DEVICE}, 32}; if(pMouse->SetProperty(DIPROP_BUFFERSIZE, &dipdw.diph) != DI_OK) { SafeRelease(pMouse); return FALSE; } if (pMouse->Acquire() != DI_OK) { SafeRelease(pMouse); return FALSE; } ///////////////////////////////////////////////////////// Now here is what the SDK for having the mouse data return ABS position instead of relative: The axis mode, which specifies whether relative or absolute data should be returned, is a property that can be changed before the device is acquired. (See Device Properties.) To set the axis mode to absolute, call IDirectInputDevice7::SetProperty with the DIPROP_AXISMODE value in the rguidProp parameter and with DIPROPAXISMODE_ABS in the dwData member of the DIPROPDWORD structure. I have tried to understand how to actually do this and read all of it, but I am just to stupid and cant understand how I actually do. Please help. Possibility

will do, i am still reading about it in SDK but still cant figure it out

Possibility

use this method

while(!fDone) {
hr = lpdiMouse->
GetDeviceData(sizeof(data),&data,&elements,0);
if(hr == DI_OK && elements == 1) {
switch(data.dwOfs) {
case DIMOFS_X:
XPos += data.dwData;
break;
case DIMOFS_Y:
YPos += data.dwData;
break;
}
}
else if(elements == 0)
fDone = true;
}