LTwain::SetImageUnit

#include "ltwrappr.h"

L_INT LTwain::SetImageUnit (nUnit)

image unit

Sets the image unit value used to transfer images from the current TWAIN source.

Parameter	Description
nUnit	Specifies the unit value to set. For more information on possible values, refer to http://www.twain.org/ and click on TWAIN Specification (Version 1.9).

Returns

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

Comments

This function internally sets the image unit capability ICAP_UNITS. For more information on this capability, refer to http://www.twain.org/ and click on TWAIN Specification (Version 1.9).

To obtain the current image unit value, call the LTwain::GetImageUnit function.

Required DLLs and Libraries

LTTWN

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:	LTwain::SetTransferOptions, LTwain::GetTransferOptions, LTwain::GetSupportedTransferMode, LTwain::SetResolution, LTwain::GetResolution, LTwain::SetImageFrame, LTwain::GetImageFrame, LTwain::GetImageUnit, LTwain::SetImageBitsPerPixel, LTwain::GetImageBitsPerPixel, LTwain::SetImageEffects, LTwain::GetImageEffects, LTwain::SetAcquirePageOptions, LTwain::GetAcquirePageOptions, LTwain::SetRGBResponse, LTwain::ShowProgress, LTwain::EnableDuplex, LTwain::GetDuplexOptions, LTwain::SetMaxXferCount, LTwain::GetMaxXferCount
Topics:	Getting and Setting Capabilities
	TWAIN Functionality: Capability Functions

Example

L_INT LTwain__SetImageUnitExample(LTwain * plTwain) 
{ 
   L_INT nRet = SUCCESS; 
   L_INT nUnit; 
   nRet = plTwain->GetImageUnit (&nUnit); 
   if (nRet == SUCCESS) 
   { 
      if (nUnit == TWUN_INCHES) 
      { 
         nRet = plTwain->SetImageUnit(TWUN_INCHES); 
         if(nRet != SUCCESS) 
            return nRet; 
      } 
   } 
   else 
      return nRet; 
   L_INT nBPP; 
   nRet = plTwain->GetImageBitsPerPixel (&nBPP); 
   if (nRet == SUCCESS) 
   { 
      if (nBPP == 24) 
         plTwain->SetImageBitsPerPixel (24); 
   } 
   else 
      return nRet; 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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