LBase::EnableCallBack

#include "ltwrappr.h"

L_BOOL LBase::EnableCallBack (bEnable)

L_BOOL bEnable;

/* flag that indicates whether to enable or disable the callback functions */

Enables or disables the callback functions.

Parameter	Description
bEnable	Flag that indicates whether to enable or disable the callback functions. Possible values are:
	Value	Meaning
	TRUE	Enable the callback functions.
	FALSE	Disable the callback functions.

Returns

The previous setting.

Comments

Call this function to enable or disable the callback overridable functions for your class object. This will enable or disable the callback functions which exist in the calling object. Other objects will not be affected by this function. All LEADTOOLS C++ Class Library classes use this setting to enable or disable the various callback functions which exist in classes derived from LBase.

Required DLLs and Libraries

LTKRN

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

See Also

Functions:

LBase::IsCallBackEnabled, Class Members

Example

L_INT LBase__EnableCallBackExample()
{
	L_INT nRet;
	LBitmap MyBitmap, Bitmap2;
	nRet = Bitmap2.Load(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\Image1.cmp"),24);  //load the bitmap at 24 bitsperpixel
	if(nRet != SUCCESS)
		return nRet;
	if(MyBitmap.IsCallBackEnabled()==FALSE)
		MyBitmap.EnableCallBack(TRUE);
	//since the callback functions are enabled for MyBitmap object then 
	//LBitmapBase::ColorResBitmapCallBack() function for this object will be called repeatedly 
	nRet = MyBitmap.ColorRes(Bitmap2, 8); 
	if(nRet != SUCCESS)
		return nRet;
	return SUCCESS;
}