Sets the grouping of the objects within the specified container.


#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnSetGrouping(hObject, bAutoGroup, uFlags)



Handle to the container object.

L_BOOL bAutoGroup

Flag that indicates whether or not to group the objects within the specified container. Possible values are:

Value Meaning
TRUE All objects within the container should be treated as a group.
FALSE Each object within the container can be selected and modified independently.

L_UINT uFlags

Flags that determine which objects to process. Most of the flags apply only to container objects. You can combine values when appropriate by using a bitwise OR ( | ). The following are valid values:

Value Meaning
0 Process only the specified object.
ANNFLAG_SELECTED [0x0001] Process only objects that have the selected property set to TRUE. For getting and setting the selected property, use the L_AnnGetSelected and L_AnnSetSelected functions.
ANNFLAG_NOTTHIS [0x0004] Process only one level of objects within the specified container, not the container itself. If there are containers within the container, they are modified, but the objects within them are not.
ANNFLAG_RECURSE [0x0008] Process objects within a container, and within any subcontainers, down to any level.
ANNFLAG_NOTCONTAINER [0x0002] (Used with ANNFLAG_RECURSE) Process objects within containers, not the containers themselves.
ANNFLAG_NOINVALIDATE [0x0010] Do not invalidate the affected rectangle in the window. Use this to avoid generating unwanted paint messages.


Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.


This function is valid only for container objects.

Each container contains a "grouping" property, which indicates whether the objects in the container should be treated as a group.

Required DLLs and Libraries


Win32, x64.

See Also




This example will temporarily disable the grouping in all objects
and re-enable the grouping later.

L_INT AnnSetGroupingExample(HANNOBJECT hContainer) 
   L_INT nRet; 
   // disable grouping in all groups 
   nRet = L_AnnSetGrouping(hContainer, L_FALSE, ANNFLAG_RECURSE); 
   if (nRet != SUCCESS) 
      return nRet; 
   /* you can now select and change individual objects within groups */ 
   // re-enable grouping in all groups. 
   // note that we do NOT enable grouping in the topmost container! 
   // if you enable the grouping in the top container, then all the  
   //objects will act as a group! 
   return  L_AnnSetGrouping(hContainer, L_TRUE, ANNFLAG_RECURSE | ANNFLAG_NOTTHIS); 

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