References ▼
#include "lvkrn.h"
L_LVKRN_API L_INT L_VecGetActiveLayer(pVector, pLayer)
Gets the active layer inside the specified vector handle.
Pointer to the source vector handle.
Pointer to a VECTORLAYER structure to be updated with the active layer.
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
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
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 );}elseMessageBox( NULL, TEXT("Not found!!"), TEXT("Active Layer"), MB_OK );return nRet;}