IsSigned example for C++ Builder
/*Load the bitmap data as signed so we can use a different conversion*/
LEADImage1->LoadSigned = True;
LEADImage1->Load ("c:\\temp\\signed.tif", 0, 0, 1);
/* use the non-default conversion "zero to center"*/
LEADImage1->ConvertSignedToUnsigned (SHIFT_ZERO_TO_CENTER);