L_VecGetActiveLayer

Summary

Gets the active layer inside the specified vector handle.

Syntax

L_LVKRN_API L_INT L_VecGetActiveLayer(pVector, pLayer)

Parameters

const pVECTORHANDLE pVector

Pointer to the source vector handle.

pVECTORLAYER pLayer

Pointer to a VECTORLAYER structure to be updated with the active layer.

Returns

Comments

Some functions will use the active layer when NULL is passed for a pVECTORLAYER parameter. This makes it easier to work with the toolkit when layers are not needed.

Required DLLs and Libraries

• LTVKRN
• For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions

• L_VecSetActiveLayer.

Topics

• Working with Vector Layers

Example

This example will show the name of the current active layer inside the vector handle.

L_INT VecGetActiveLayerExample(pVECTORHANDLE pVector) 
{ 
   VECTORLAYER       Layer; 
   VECTORLAYERDESC   LayerDesc; 
   L_INT             nRet; 
 
   /* Get the active layer layer */ 
   nRet = L_VecGetActiveLayer( pVector, &Layer ); 
   if( nRet == SUCCESS ) 
   { 
      /* Get its name */ 
      nRet = L_VecGetLayer( pVector, &Layer, &LayerDesc ); 
      if(nRet != SUCCESS) 
         return nRet; 
 
      MessageBox( NULL, LayerDesc.szName, TEXT("Active Layer"), MB_OK ); 
      nRet = L_VecFreeLayer( &LayerDesc ); 
   } 
   else 
      MessageBox( NULL, TEXT("Not found!!"), TEXT("Active Layer"), MB_OK ); 
 
   return nRet; 
}