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"); }