.NET (Core and Framework)

// avoid dialog boxes with "There is no disk in the drive" !
using (new LP_SetErrorMode(ErrorModes.FailCriticalErrors)) {
    // do whatever needs to be done
    // when leaving the using block, the ErrorMode is returned
    // to its original value automatically
}

using System;
using System.Runtime.InteropServices;	// DllImport, MarschalAs

namespace LP_Core {
	/// <summary>
	/// Possible mode flags for LP_SetErrorMode constructor.
	/// </summary>
	[Flags]
	public enum ErrorModes {
		/// <summary>
		/// Use the system default, which is to display all error dialog boxes
		/// </summary>
		Default=0x0,
		/// <summary>
		/// The system does not display the critical-error-handler message box.
		/// Instead, the system sends the error to the calling process.
		/// </summary>
		FailCriticalErrors=0x1,
		/// <summary>
		/// 64-bit Windows:  The system automatically fixes memory alignment faults
		/// and makes them invisible to the application. It does this for the
		/// calling process and any descendant processes.
		/// </summary>
		NoOpFaultErrorBox=0x2,
		/// <summary>
		/// The system does not display the general-protection-fault message box.
		/// This flag should only be set by debugging applications that handle
		/// general protection (GP) faults themselves with an exception handler.
		/// </summary>
		NoAlignmentFaultExcept=0x4,
		/// <summary>
		/// The system does not display a message box when it fails to find a file.
		/// Instead, the error is returned to the calling process.
		/// </summary>
		NoOpenFileErrorBox=0x8000
	}
	/// <summary>
	/// LP_SetErrorMode temporarily changes the Windows error mode.
	/// It can be used to try and get a file list on removable media drives
	/// (in order to avoid the dialog box "There is no disk in the drive")
	/// </summary>
	public struct LP_SetErrorMode : IDisposable {
		private int oldErrorMode;

		/// <summary>
		/// Create an instance of LP_SetErrorMode to change the Windows error mode.
		/// </summary>
		/// <remarks>With a using statement, the original value will be restored when the
		/// instance is automatically disposed.</remarks>
		/// <param name="mode"></param>
		public LP_SetErrorMode(ErrorModes mode) {
			oldErrorMode=SetErrorMode((int)mode);	// FailCriticalErrors
		}

		void IDisposable.Dispose() {
			SetErrorMode(oldErrorMode);
		}

		[DllImport("kernel32.dll")]
			private static extern int SetErrorMode(int mode);
	}
}

Wheatbread wrote:

Does .NET use CString or only CStringT? Anyway to have it accept CString or do we need to go and do a global replace
for CString w/ CStringT?

Wheatbread wrote:

Any ideas on this or other porting issues we may run into would be
appreciated. Thanks.