How to access ArcMap Options using ArcObjects?

[BarbaraSchneider1]

Is there a way to access the ArcMap Options using ArcObjects (In ArcMap select  Customize - ArcMap Options)?

[nicogis]

for example for cad:

//Set CadSettings to a new CadWorkspaceFactory.
ESRI.ArcGIS.DataSourcesFile.ICadSettings pCadSettings = new
    ESRI.ArcGIS.DataSourcesFile.CadWorkspaceFactory()as
    ESRI.ArcGIS.DataSourcesFile.ICadSettings;
//Enable support to examine all files for DGN format.
pCadSettings.EnableAllDgnFileExtensions = true;
//Print the results to the console.
Console.WriteLine("EnableAllDgnFileExtensions = {0}",
    pCadSettings.EnableAllDgnFileExtensions);

or for example hardware acceleration (IGlobalScreenDisplaySettings ) :

ArcObjects Help for .NET developers

see Interface *Settings

What's the setting that you need change?

[BarbaraSchneider1]

I need to change the raster layer settings. However, I cannot find IRasterLayerSettings or similar.

[nicogis · Accepted solution]

try see IRasterDefaultsEnv9 Interface (ArcObjects .NET 10.1 SDK)  IRasterDefaultsEnv1..9