c# - 如何检查辅助工具是否在 XForms UWP 中运行

Question

我需要检查辅助工具（讲述人）是否在 Windows 平台上运行。我已经尝试过以下操作

1个不工作，2个我也试过了，它在获取系统参数时总是显示错误。1.

AutomationPeer.ListenerExists(AutomationEvents.AutomationFocusChanged);

2.

[DllImport("user32", CharSet = CharSet.Auto)]
internal static extern long SystemParametersInfo(long uAction, int lpvParam, ref bool uParam, int fuWinIni);



public static bool IsScreenReaderRunning()
{
    long SPI_GETSCREENREADER = 70L;
    bool bScreenReader = false;
    long retVal;

    retVal = SystemParametersInfo(SPI_GETSCREENREADER, 0, ref bScreenReader, 0);

    //uint iParam = 0;
    //uint iUpdate = 0;
    //bool result = false;
    //bool bReturn = SystemParametersInfo(SPI_GETSCREENREADER, iParam, &bScreenReader, iUpdate);
    return bScreenReader;
}

public static void ScreenReaderOn()
{
    long SPI_GETSCREENREADER = 71L;
    bool bScreenReader = true;
    long retVal;

    retVal = SystemParametersInfo(SPI_GETSCREENREADER, 0, ref bScreenReader, 0);
}

public static void ScreenReaderOff()
{
    long SPI_GETSCREENREADER = 71L;
    bool bScreenReader = false;
    long retVal;

    retVal = SystemParametersInfo(SPI_GETSCREENREADER, 0, ref bScreenReader, 0);
}

标签： c#xamarin.formsxamarin.uwp