Initial mouse pointer positioning on a dialog control

[Gintaras]

Here works. Windows 10. Not tested on XP. If dialog is in wrong position when it receives WM_INITDIALOG, other good message for it is WM_SHOWWINDOW with wParam 1:
case WM_SHOWWINDOW if(wParam=1) mou 10 10 hDlg
Or use timer.