C#

Type tSWApp = Type.GetTypeFromProgID("SldWorks.Application");
object swApp = Activator.CreateInstance(tSWApp);
IDispatch idisp = (IDispatch)swApp;

// Getting the visible property (this part works)
Guid guid = new Guid();
int[] nIds = new int[] { 0 };
nRetVal = idisp.GetIDsOfNames(ref guid, new string[] { "Visible" }, 1, 0, nIds);

DISPPARAMS dispParams = new DISPPARAMS();
dispParams.cArgs = 0;
dispParams.cNamedArgs = 0;
object pVarResult;

System.Runtime.InteropServices.ComTypes.EXCEPINFO excepInfo = new System.Runtime.InteropServices.ComTypes.EXCEPINFO();

nRetVal = idisp.Invoke(nIds[0], ref guid, 0, (ushort)System.Runtime.InteropServices.ComTypes.INVOKEKIND.INVOKE_PROPERTYGET, ref dispParams, out pVarResult, ref excepInfo, null);

// Launching a function with parameters
object[] oArgs = new object[]{ 10 };
nRetVal = idisp.GetIDsOfNames(ref guid, new string[] { "GetUserPreferenceIntegerValue" }, 1, 0, nIds);
dispParams.cArgs = 1;
--> dispParams.rgvarg = ???; <-- Here, I must provide a IntPtr object that represent the array "oArgs" defined above.
dispParams.cNamedArgs = 0;
dispParams.rgdispidNamedArgs = new object[] { };
nRetVal = idisp.Invoke(nIds[0], ref guid, 0, (ushort)System.Runtime.InteropServices.ComTypes.INVOKEKIND.INVOKE_FUNC, ref dispParams, out pVarResult, ref excepInfo, null);