L_AnnChangeUserHandle

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnChangeUserHandle(hObject, nIndex, pAnnHandle)

HANNOBJECT hObject;	/* handle to the annotation object */
L_INT32 nIndex;	/* index of the user handle to change */
pANNHANDLE pAnnHandle;	/* pointer to a structure that defines how to change the user handle */

Changes properties of an existing user-defined annotation handle.

This function is available in the Document and Medical Imaging toolkits.

Parameter	Description
hObject	Handle to the annotation object for which to change the user handle.
nIndex	Index of the user handle to change. This index is zero-based.
pAnnHandle	Pointer to a structure that defines how to change the user handle.

Returns

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

Comments

Use this function to change the properties of an existing user-defined annotation handle.

This function is used in conjunction with the L_AnnAddUserHandle and L_AnnEnumerateHandles and L_AnnChangeUserHandle functions.

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

Windows 2000 / XP/Vista.

See Also

Functions:	L_AnnDefine, L_AnnAddUserHandle, L_AnnAdjustPoint, L_AnnConvert, L_AnnDefine2, L_AnnDeleteUserHandle, L_AnnEnumerateHandles, L_AnnGetRestrictToContainer, L_AnnGetRotateAngle, L_AnnGetUserHandle, L_AnnGetUserHandles, L_AnnHitTest, L_AnnRestrictCursor, L_AnnSetRestrictToContainer
Topics:	Annotation Functions: Creating and Deleting Annotations
	Implementing Custom Annotations
	Implementing Annotations
	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program

Example

This example changes the first user handle of an object by * Moving handle ten pixels to the left * Changing color of handle to blue * Changing shape of handle to square * Displays the hour glass cursor when mouse over the handle

 L_INT AnnChangeUserHandleExample(HANNOBJECT hObject)
{
   L_INT nRet;
   L_UINT      uCount;
   ANNHANDLE   AnnHandle;

   // Get the total count of user handles
   nRet = L_AnnGetUserHandles(hObject, NULL, &uCount);
   if(nRet != SUCCESS)
      return nRet;
   if (uCount > 0)
   {
      memset(&AnnHandle, 0, sizeof(ANNHANDLE));
      AnnHandle.uStructSize = sizeof(&AnnHandle);
      nRet = L_AnnGetUserHandle(hObject, 0, &AnnHandle);
      if(nRet != SUCCESS)
         return nRet;

      AnnHandle.aptContainer.x +=10;
      AnnHandle.crFill = RGB(0,0,255);
      AnnHandle.nShape = ANNHANDLE_SHAPE_SQUARE;
      AnnHandle.hCursor = LoadCursor(NULL,IDC_APPSTARTING);
      AnnHandle.uFlags = ANNHANDLE_FILL_COLOR | ANNHANDLE_SHAPE | ANNHANDLE_LOCATION | ANNHANDLE_CONTAINER_COORDINATES;

     
      nRet = L_AnnChangeUserHandle(hObject, 0, &AnnHandle);
      if(nRet != SUCCESS)
         return nRet;
   }
   else
   {
      MessageBox(NULL, TEXT("No User Handles!"), TEXT("Error"), MB_OK);
      return 0;
   }
   return SUCCESS;
}