public static bool IsAvailable(ImeClass imeClass)
{
WinApi.Ole32.CoInitialize(IntPtr.Zero);
if (Thread.CurrentThread.GetApartmentState() == ApartmentState.MTA)
{
throw new Exception("Cannot run under Multiple Threaded Apartment mode because it will fail while creating COM object IFELanguage.");
}
MsIme.IFELanguage ifeLanguage = null;
try
{
int errCode = Ole32.CLSIDFromString(s_ImeClassNames[(int)imeClass], out Guid imeGuid);
WinBase.CheckError(errCode);
Guid feLangIID = new Guid(MsIme.Constants.IID_IFELanguage);
IntPtr ppv;
errCode = Ole32.CoCreateInstance(imeGuid, IntPtr.Zero, Ole32.CLSCTX_SERVER,
feLangIID, out ppv);
WinBase.CheckError(errCode);
ifeLanguage = Marshal.GetTypedObjectForIUnknown(ppv, typeof(MsIme.IFELanguage)) as MsIme.IFELanguage;
errCode = ifeLanguage.Open();
WinBase.CheckError(errCode);
IntPtr cmodeCaps;
errCode = ifeLanguage.GetConversionModeCaps(out cmodeCaps);
WinBase.CheckError(errCode);
}
catch
{
try
{
ifeLanguage?.Close();
}
catch
{
// ignore error.
}
return(false);
}
return(true);
}
private void OpenIFELanguage()
{
if (_ifeLangOpened)
{
CloseIFELanguage();
}
if (Thread.CurrentThread.GetApartmentState() == ApartmentState.MTA)
{
throw new Exception("Cannot run under Multiple Threaded Apartment mode because it will fail while creating COM object IFELanguage.");
}
Guid imeGuid;
int errCode = Ole32.CLSIDFromString(s_ImeClassNames[(int)_imeClass], out imeGuid);
WinBase.CheckError(errCode);
Guid feLangIID = new Guid(MsIme.Constants.IID_IFELanguage);
IntPtr ppv;
errCode = Ole32.CoCreateInstance(imeGuid, IntPtr.Zero, Ole32.CLSCTX_SERVER,
feLangIID, out ppv);
WinBase.CheckError(errCode);
_ifeLanguage = Marshal.GetTypedObjectForIUnknown(ppv, typeof(MsIme.IFELanguage)) as MsIme.IFELanguage;
errCode = _ifeLanguage.Open();
WinBase.CheckError(errCode);
_ifeLangOpened = true;
IntPtr cmodeCaps;
errCode = _ifeLanguage.GetConversionModeCaps(out cmodeCaps);
WinBase.CheckError(errCode);
_convModeCaps = cmodeCaps.ToInt32();
}