public static void SetCommandText(IntPtr pCmdTextInt, string text)
{
if (text != null)
{
OLECMDTEXT olecmdtext = (OLECMDTEXT)Marshal.PtrToStructure(pCmdTextInt, typeof(OLECMDTEXT));
if ((olecmdtext.cmdtextf & (uint)OLECMDTEXTF.OLECMDTEXTF_NAME) == 0)
{
return;
}
char[] source = text.ToCharArray();
IntPtr bufferOffset = Marshal.OffsetOf(typeof(OLECMDTEXT), "rgwz");
IntPtr lengthOffset = Marshal.OffsetOf(typeof(OLECMDTEXT), "cwActual");
int length = Math.Min(((int)olecmdtext.cwBuf) - 1, source.Length);
// copy the new text
long bufferAddress = (long)pCmdTextInt + (long)bufferOffset;
Marshal.Copy(source, 0, (IntPtr)bufferAddress, length);
// null terminator
Marshal.WriteInt16(pCmdTextInt, (int)bufferOffset + (length * 2), 0);
// length including null terminator
Marshal.WriteInt32(pCmdTextInt, (int)lengthOffset, length + 1);
}
}
/// <summary>
/// Gets the flags of the OLECMDTEXT structure
/// </summary>
/// <param name="pCmdTextInt">The structure to read.</param>
/// <returns>The value of the flags.</returns>
public static OLECMDTEXTF GetFlags(IntPtr pCmdTextInt)
{
Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT pCmdText = (Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT)Marshal.PtrToStructure(pCmdTextInt, typeof(Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT));
if ((pCmdText.cmdtextf & (int)OLECMDTEXTF.OLECMDTEXTF_NAME) != 0)
{
return(OLECMDTEXTF.OLECMDTEXTF_NAME);
}
if ((pCmdText.cmdtextf & (int)OLECMDTEXTF.OLECMDTEXTF_STATUS) != 0)
{
return(OLECMDTEXTF.OLECMDTEXTF_STATUS);
}
return(OLECMDTEXTF.OLECMDTEXTF_NONE);
}
private static string GetCommandText(IntPtr structPtr)
{
if (structPtr == IntPtr.Zero)
{
return(string.Empty);
}
OLECMDTEXT olecmdtext = (OLECMDTEXT)Marshal.PtrToStructure(structPtr, typeof(OLECMDTEXT));
if (olecmdtext.cwActual == 0)
{
return(string.Empty);
}
IntPtr offset = Marshal.OffsetOf(typeof(OLECMDTEXT), "rgwz");
IntPtr ptr = (IntPtr)((long)structPtr + (long)offset);
return(Marshal.PtrToStringUni(ptr, (int)olecmdtext.cwActual - 1));
}
public static void SetText(IntPtr pCmdTextInt, string text)
{
Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT pCmdText = (Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT)Marshal.PtrToStructure(pCmdTextInt, typeof(Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT));
char[] menuText = text.ToCharArray();
// Get the offset to the rgsz param. This is where we will stuff our text
//
IntPtr offset = Marshal.OffsetOf(typeof(Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT), "rgwz");
IntPtr offsetToCwActual = Marshal.OffsetOf(typeof(Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT), "cwActual");
// The max chars we copy is our string, or one less than the buffer size,
// since we need a null at the end.
//
int maxChars = Math.Min((int)pCmdText.cwBuf - 1, menuText.Length);
Marshal.Copy(menuText, 0, (IntPtr)((long)pCmdTextInt + (long)offset), maxChars);
// append a null character
Marshal.WriteInt16((IntPtr)((long)pCmdTextInt + (long)offset + maxChars * 2), 0);
// write out the length
// +1 for the null char
Marshal.WriteInt32((IntPtr)((long)pCmdTextInt + (long)offsetToCwActual), maxChars + 1);
}
/// <summary>
/// Initializes a new instance of the <see cref="OleCommandText"/> class from the specified pointer.
/// </summary>
/// <param name="oleCmdText">A pointer to the <see cref="OLECMDTEXT"/> structure in unmanaged memory.</param>
/// <exception cref="ArgumentNullException">
/// If <paramref name="oleCmdText"/> is <see cref="IntPtr.Zero"/>.
/// </exception>
private unsafe OleCommandText(OLECMDTEXT* oleCmdText)
{
Contract.Requires<ArgumentNullException>(oleCmdText != null, "oleCmdText");
_oleCmdText = oleCmdText;
}
