References ▼
#include "lvkrn.h"
L_LVKRN_API L_INT L_VecGetLayerCount(pVector)
Returns the number of layers inside a vector handle.
Pointer to the vector handle.
Number of layers.
After calling this function, L_VecGetLayerByIndex can be used to iterate through the layers in a vector handle.
Required DLLs and Libraries
This example will show the names of the all layers inside a vector handle, in a message box.
L_INT VecGetLayerCountExample(pVECTORHANDLE pVector){L_INT nRet;L_INT nCount, i;VECTORLAYER Layer;VECTORLAYERDESC LayerDesc;/* Get number of layers inside the vector handle */nCount = L_VecGetLayerCount( pVector );nRet = SUCCESS;/* Iterate through the layers */for( i = 0; i < nCount; i++ ){/* Get layer and its descriptor */nRet = L_VecGetLayerByIndex( pVector, i, &Layer );if(nRet != SUCCESS)return nRet;nRet = L_VecGetLayer( pVector, &Layer, &LayerDesc );if(nRet != SUCCESS)return nRet;/* Show name in a message box */MessageBox( NULL, LayerDesc.szName, TEXT("Layer Name"), MB_OK );/* Free the layer descriptor because it's no longer needed */nRet = L_VecFreeLayer( &LayerDesc );}return nRet;}