How to Know if Map are install or not by Programmatically?

Below Point are mention  it

// OS 4.5 - 5.0

int mh1 = CodeModuleManager.getModuleHandle("net_rim_bb_lbs"); 

// OS 6.0
int mh2 = CodeModuleManager.getModuleHandle("net_rim_bb_maps"); 
if (mh1 == 0 && mh2 == 0) {
   Dialog.alert("BlackBerry Maps not installed");
}