LTwain::SetImageFrame

#include "ltwrappr.h"

L_INT LTwain::SetImageFrame (pFrame);

pointer to a structure

Sets the image frame used when transferring images from the current TWAIN source.

Parameter	Description
pFrame	Pointer to a variable that contains the image frame value to set.

Returns

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

Comments

The image frame specifies the size and location of the image to acquire. To obtain the current image frame value, call the LTwain::GetImageFrame 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::GetImageFrame, LTwain::SetImageUnit, 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

TW_FIX32 FloatToTWFix32 (float Floater) 
{ 
   TW_FIX32 Fix32; 
   TW_INT32 Int32 = (TW_INT32)(Floater * 65536.0 + 0.5); 
   Fix32.Whole = (TW_INT16) (Int32 >> 16); 
   Fix32.Frac = (TW_UINT16) (Int32 & 0x0000FFFFL); 
   return Fix32; 
} 
L_INT LTwain__SetImageFrameExample(LTwain * plTwain) 
{ 
   L_INT    nRet = SUCCESS; 
   TW_FRAME frame; 
   nRet = plTwain->GetImageFrame (&frame); 
   if (nRet == SUCCESS) 
   { 
      frame.Left = FloatToTWFix32(0); 
      frame.Top = FloatToTWFix32(0); 
      frame.Right = FloatToTWFix32(8.5); 
      frame.Bottom = FloatToTWFix32(11); 
      nRet = plTwain->SetImageFrame(&frame); 
      if(nRet != SUCCESS) 
         return nRet; 
   } 
   else 
      return nRet; 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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