From Forum Nokia Wiki

We can specify an image for the navigation pane in the resource file using the NAVI_IMAGE resource. This resource has three fields:

• bmpfile - Specifies a .mbm file to use.
• bmpid - Specifies an index of the bitmap to use within the .mbm file.
• bmpmask - Optionally specifies an index of the mask to use within the .mbm file.

The following is the code snippet for .rss file :

#include <avkon.mbg>
 
RESOURCE NAVI_IMAGE r_yourapplication_navi_image
   {
 
   bmpfile = "\\system\data\avkon.mbm"; // or KAvkonBitmapFile define in  avkon.rh
 
   bmpid = EMbmAvkonQgn_stat_keyguard;
 
   }

The bmpfile field specifies the .mbm file's location, and the specific bitmap to use from the file is specified by the bmpid field.

TUid naviPaneUid;
naviPaneUid.iUid = EEikStatusPaneUidNavi;
CEikStatusPane* statusPane = StatusPane();
CEikStatusPaneBase::TPaneCapabilities subPane = statusPane->PaneCapabilities(naviPaneUid);
 
// if we can access the navigation pane
 
if (subPane.IsPresent() && subPane.IsAppOwned())
{
	CAknNavigationControlContainer* naviPane = (CAknNavigationControlContainer*)statusPane->ControlL(naviPaneUid);
 
 
 
            // read the navigation pane image resource
            TResourceReader reader;
 
 
            iCoeEnv->CreateResourceReaderLC(reader, R_YOURAPPLICATION_NAVI_IMAGE);
 
            if (iNaviDecorator)
            {
 
	               delete iNaviDecorator;
	               iNaviDecorator = NULL;
 
            }
 
           // set the navigation pane image
            iNaviDecorator = naviPane->CreateNavigationImageL(reader);
           // pushed by CreateResourceReaderLC
           CleanupStack::PopAndDestroy(); 
           naviPane->PushL(*iNaviDecorator);
}