windows-xp/Source/XPSP1/NT/shell/osshell/accessib/osk/inc/dgadvsca.h

INT_PTR AdvScanDlgFunc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

INT_PTR CALLBACK AdvScanDlgProc(HWND hDlg, UINT message,
                                WPARAM wParam, LPARAM lParam);

void ConfigSwitchKey(UINT vk, BOOL bSet);