LAnnLine::DeleteUserHandle

#include "ltwrappr.h"

virtual L_INT LAnnLine::DeleteUserHandle(nIndex)

L_INT32 nIndex;

/* index of the user handle to delete */

Deletes an existing user-defined annotation handle.

Parameter

Description

nIndex

Index of the user-defined handle to delete. The index is zero based. Pass -1 to delete all user-defined handles. Passing a negative value other than 1 makes the function return ERROR_INV_PARAMETER.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

Call this function to delete a user-defined handle from an annotation object.

Set uIndex to -1 to delete all the user-defined handles.

Required DLLs and Libraries

LTANN

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.

See Also

Functions:

Class Members, LAnnLine::AddUserHandle, LAnnLine::EnumerateHandles, LAnnLine::EnumHandleCallBack, LAnnLine::GetUserHandle, LAnnLine::GetUserHandles, LAnnLine::ChangeUserHandle, LAnnContainer::Convert, LAnnContainer::HitTest, LAnnContainer::RestrictCursor, LAnnotation::GetRestrictToContainer, LAnnotation::SetRestrictToContainer, LAnnotation::Define2, LAnnotation::Define

Topics:

Annotation Functions: Object Properties

 

Implementing Annotations

 

Automated User Interface for Annotations

 

Annotation Functions: Creating and Deleting Annotations

 

Types of Annotations

 

Annotation Functions: Implementing Custom Annotations

 

Annotation Functions: Creating Custom Annotations

Example

// This examples deletes the first user handle of an object. 

L_INT LAnnLine_DeleteUserHandleExample(LAnnLine *LLine) 
{
   L_INT nRet;
   L_UINT uCount; 
   // Get the total count of user handles
   nRet = LLine->GetUserHandles(NULL, &uCount); 
   if(nRet != SUCCESS)
      return nRet;
   if (uCount > 0) 
   {
      nRet = LLine->DeleteUserHandle(0); 
      if(nRet != SUCCESS)
         return nRet;
      }
   else
   {
      MessageBox(NULL, TEXT("No User Handles!"), TEXT("Error"), MB_OK); 
      return FAILURE;
   }
   return SUCCESS;
}