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Code Issues Releases Wiki Activity

Added QueryInterface methods

pull/38/head
David Hall 2019-01-27 00:45:43 -05:00
parent d33b14f84f
commit b2f8dc8c89
1 changed files with 24 additions and 0 deletions
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24
PInvoke/Shell32/ShObjIdl.ShellUtil.cs
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@ -74,6 +74,30 @@ namespace Vanara.PInvoke
return (IShellItem)unk;
}
/// <summary>Requests a specified interface from a COM object.</summary>
/// <param name="iUnk">The interface to be queried.</param>
/// <param name="riid">The interface identifier (IID) of the requested interface.</param>
/// <returns>The returned interface.</returns>
public static object QueryInterface(in object iUnk, in Guid riid)
{
QueryInterface(iUnk, riid, out var ppv).ThrowIfFailed();
return ppv;
}
/// <summary>Requests a specified interface from a COM object.</summary>
/// <param name="iUnk">The interface to be queried.</param>
/// <param name="riid">The interface identifier (IID) of the requested interface.</param>
/// <param name="ppv">When this method returns, contains the returned interface.</param>
/// <returns>An HRESULT that indicates the success or failure of the call.</returns>
public static HRESULT QueryInterface(in object iUnk, in Guid riid, out object ppv)
{
var tmp = riid;
HRESULT hr = Marshal.QueryInterface(Marshal.GetIUnknownForObject(iUnk), ref tmp, out var ippv);
ppv = hr.Succeeded ? Marshal.GetObjectForIUnknown(ippv) : null;
System.Diagnostics.Debug.WriteLine($"Successful QI:\t{riid}");
return hr;
}
[ComVisible(true)]
private class IntFileSysBindData : IFileSystemBindData2
{