Eu acho que este artigo deve ajudá-lo: http://msdn.microsoft.com/pt-br/library/windows/desktop/ee416808(v=vs.85).aspx
Se você olhar para o segundo exemplo, verá que basicamente dá o que você quer. Você pode colocar o código abaixo (além do método WinMain) em um arquivo separado e fazer com que seu programa o chame.
STICKYKEYS g_StartupStickyKeys = {sizeof(STICKYKEYS), 0};
TOGGLEKEYS g_StartupToggleKeys = {sizeof(TOGGLEKEYS), 0};
FILTERKEYS g_StartupFilterKeys = {sizeof(FILTERKEYS), 0};
INT WINAPI WinMain( HINSTANCE, HINSTANCE, LPSTR, int )
{
// Save the current sticky/toggle/filter key settings so they can be restored them later
SystemParametersInfo(SPI_GETSTICKYKEYS, sizeof(STICKYKEYS), &g_StartupStickyKeys, 0);
SystemParametersInfo(SPI_GETTOGGLEKEYS, sizeof(TOGGLEKEYS), &g_StartupToggleKeys, 0);
SystemParametersInfo(SPI_GETFILTERKEYS, sizeof(FILTERKEYS), &g_StartupFilterKeys, 0);
// Disable when full screen
AllowAccessibilityShortcutKeys( false );
// Restore back when going to windowed or shutting down
AllowAccessibilityShortcutKeys( true );
}
void AllowAccessibilityShortcutKeys( bool bAllowKeys )
{
if( bAllowKeys )
{
// Restore StickyKeys/etc to original state and enable Windows key
STICKYKEYS sk = g_StartupStickyKeys;
TOGGLEKEYS tk = g_StartupToggleKeys;
FILTERKEYS fk = g_StartupFilterKeys;
SystemParametersInfo(SPI_SETSTICKYKEYS, sizeof(STICKYKEYS), &g_StartupStickyKeys, 0);
SystemParametersInfo(SPI_SETTOGGLEKEYS, sizeof(TOGGLEKEYS), &g_StartupToggleKeys, 0);
SystemParametersInfo(SPI_SETFILTERKEYS, sizeof(FILTERKEYS), &g_StartupFilterKeys, 0);
}
else
{
// Disable StickyKeys/etc shortcuts but if the accessibility feature is on,
// then leave the settings alone as its probably being usefully used
STICKYKEYS skOff = g_StartupStickyKeys;
if( (skOff.dwFlags & SKF_STICKYKEYSON) == 0 )
{
// Disable the hotkey and the confirmation
skOff.dwFlags &= ~SKF_HOTKEYACTIVE;
skOff.dwFlags &= ~SKF_CONFIRMHOTKEY;
SystemParametersInfo(SPI_SETSTICKYKEYS, sizeof(STICKYKEYS), &skOff, 0);
}
TOGGLEKEYS tkOff = g_StartupToggleKeys;
if( (tkOff.dwFlags & TKF_TOGGLEKEYSON) == 0 )
{
// Disable the hotkey and the confirmation
tkOff.dwFlags &= ~TKF_HOTKEYACTIVE;
tkOff.dwFlags &= ~TKF_CONFIRMHOTKEY;
SystemParametersInfo(SPI_SETTOGGLEKEYS, sizeof(TOGGLEKEYS), &tkOff, 0);
}
FILTERKEYS fkOff = g_StartupFilterKeys;
if( (fkOff.dwFlags & FKF_FILTERKEYSON) == 0 )
{
// Disable the hotkey and the confirmation
fkOff.dwFlags &= ~FKF_HOTKEYACTIVE;
fkOff.dwFlags &= ~FKF_CONFIRMHOTKEY;
SystemParametersInfo(SPI_SETFILTERKEYS, sizeof(FILTERKEYS), &fkOff, 0);
}
}
}
Espero que isso ajude.