LFile::IsValid

#include "ltwrappr.h"

L_BOOL LFile::IsValid()

Determines whether the LFile object is ready to be used.

Returns

TRUE

The LFile object is ready to be used.

FALSE

The LFile object is not ready to be used.

Comments

Before you can use some of the file functions, a bitmap and a filename must be associated with the class object. Until you have associated a bitmap and a filename with the LFile object, the object is considered invalid.

The function will return TRUE only if both the filename and the bitmap have been set and are valid.

The following table describes the functions that require either the bitmap, filename, or both to be set:

 

Functions:

Requirements:

LFile::GetInfo

requires the filename to be set

LFile::DeletePage

requires the filename to be set

LFile::ReadLoadResolutions

requires the filename to be set

LFile::ReadFileTransforms

requires the filename to be set

LFile::WriteFileTransforms

requires the filename to be set

LFile::GetCommentSize

requires the filename to be set

LFile::GetPCDResolution

requires the filename to be set

LFile::LoadBitmapList

requires the filename to be set

LFile::LoadOffset

requires the bitmap to be set

LFile::ReadComment

requires the filename to be set

LFile::ReadCommentExt

requires the filename to be set

LFile::ReadTag

requires the filename to be set

LFile::SaveList

requires the filename to be set

LFile::SaveOffset

requires the bitmap to be set

LFile::WriteComment

requires the filename to be set

LFile::FileConvert

does not require either filename or bitmap to be set

 

Required DLLs and Libraries

LTFIL
File format DLLs

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

Example

L_INT LFile__IsValidExample()
{
   LBitmapBase LeadBitmap;
   LFile           LeadFile;
   if (LeadFile.IsValid() == FALSE)
      LeadFile.SetBitmap(&LeadBitmap);
   return SUCCESS ;
}