In This Topic ▼

LBitmapList::IsCreated

#include "ltwrappr.h"

virtual L_BOOL LBitmapList::IsCreated()

Determines whether a bitmap list has been created.

Returns

Value	Meaning
TRUE	A bitmap list has been created.
FALSE	A bitmap list has not been created.

Comments

The class object must contain a created bitmap list before you can use functions to insert, remove, or otherwise access bitmap list items.

You can create a bitmap list for the class object by doing one of the following:

calling LBitmapList::Create
calling the constructor LBitmapList(LBitmapList * pBitmapList)
using the = operator
using LBitmapList::Load
calling LBitmapList::CopyItems
calling LBitmapList::SetBitmapList
calling LBitmapList::SetHandle

Required DLLs and Libraries

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

Platforms

Win32, x64.

Example

L_INT LBitmapList__IsCreatedExample(HWND hWnd) 
{ 
   L_INT nRet; 
   LBitmapList BitmapList; 
   LBitmapBase Bitmap; 
   L_BOOL bIsCreated; 
 
   nRet =BitmapList.Create (); 
   if(nRet !=SUCCESS) 
      return nRet; 
   // load three images and insert them in the list 
   nRet =Bitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp")), 0,ORDER_BGR); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =BitmapList.InsertItem (&Bitmap); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =Bitmap.Load(MAKE_IMAGE_PATH(TEXT("image2.cmp")), 0,ORDER_BGR); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =BitmapList.InsertItem (&Bitmap); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =Bitmap.Load(MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\Image3.cmp")), 0,ORDER_BGR); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =BitmapList.InsertItem (&Bitmap); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   // get the internal handle 
   bIsCreated = BitmapList.IsCreated (); 
   if(bIsCreated == TRUE) 
      MessageBox(hWnd, TEXT("List created successfully"), TEXT("LBitmapList"), MB_OK); 
 
   // destroy the list 
   BitmapList.Destroy (); 
    
   return SUCCESS; 
}