private void SetStickKeysFlags(StickyKeys.Flags flags)
{
uint stickyKeysSize = (uint)Marshal.SizeOf(typeof(Win32Struct));
Win32Struct stickyKeys = new Win32Struct {
cbSize = stickyKeysSize, dwFlags = flags
};
bool result = SystemParametersInfo(uiActions.SPI_SETSTICKYKEYS, stickyKeysSize, ref stickyKeys, 0);
if (!result)
{
throw new System.ComponentModel.Win32Exception();
}
}
private Win32Struct GetSystemParameters()
{
Win32Struct win32Struct = new Win32Struct();
win32Struct.cbSize = Marshal.SizeOf(win32Struct);;
bool result = SystemParametersInfo(uiActions.SPI_GETHIGHCONTRAST, win32Struct.cbSize, ref win32Struct, 0);
if (!result)
{
throw new System.ComponentModel.Win32Exception();
}
return(win32Struct);
}
private Win32Struct GetStickyKeysFromSPI()
{
uint stickyKeysSize = (uint)Marshal.SizeOf(typeof(Win32Struct));
Win32Struct stickyKeys = new Win32Struct {
cbSize = stickyKeysSize, dwFlags = 0
};
bool result = SystemParametersInfo(uiActions.SPI_GETSTICKYKEYS, stickyKeysSize, ref stickyKeys, 0);
if (!result)
{
throw new System.ComponentModel.Win32Exception();
}
return(stickyKeys);
}
/// <summary>
/// Applies the HighContrast instance's current state to the system
/// </summary>
/// <example>
/// // turn high contrast on
/// var hc = new HighContrast();
/// hc.IsHighContrastOn = true;
/// hc.Apply();
/// </example>
public void Apply()
{
Win32Struct win32Struct = new Win32Struct();
string colorSchemeText = GetColorSchemeText(this.Theme);
win32Struct.lpszDefaultScheme = Marshal.StringToHGlobalUni(colorSchemeText);
win32Struct.dwFlags = (int)BuildFlags();
win32Struct.cbSize = Marshal.SizeOf(win32Struct);
bool result = SystemParametersInfo(uiActions.SPI_SETHIGHCONTRAST, win32Struct.cbSize, ref win32Struct, 0);
Marshal.FreeHGlobal(win32Struct.lpszDefaultScheme); // TODO: Ensure this memory is freed via try/catch/finally
if (!result)
{
throw new System.ComponentModel.Win32Exception();
}
}
