Hi, the problem is that our Win32Display implementation is not tracking mouse position when mouse leaves the window, so the latest WM_MOUSEMOVE received is inside the window and over the Button that shows the ToolTip, keeping the tooltip visible.

I made a simple test using TrackMouseEvent to generate a last MouseMove event when WM_MOUSELEAVE is received and then it works as expected:

case WM_MOUSEMOVE:

{

if (!mTrackingMouse)

{

TRACKMOUSEEVENT e =

{

sizeof(TRACKMOUSEEVENT),

TME_LEAVE,

mWindowHandle,

HOVER_DEFAULT

};

TrackMouseEvent(&e);

mTrackingMouse = true;

}

mMouseMove(this, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
return false;
}
case WM_MOUSELEAVE:

{

mTrackingMouse = false;

POINT mousePos;

GetCursorPos(&mousePos);

ScreenToClient(mWindowHandle, &mousePos);
// make sure it is outside right-bottom border of client area
if (mousePos.x > 0) mousePos.x += 1;
if (mousePos.y > 0) mousePos.y += 1;

mMouseMove(this, mousePos.x, mousePos.y);
return true;
}

Hi Sergio,

Thanks. I confirmed that fixed the issue.