String to L_TCHAR* - string conversion

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Sunday, August 13, 2017 4:26:37 PM(UTC)

TBone

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Hi,

I am using L_LoadBitmap based functions for my OCR and noticed that it take L_TCHAR pointers while rest of the UI work in String based. Are there API functions that take String or some easy way of converting String to L_TCHAR? I am sure someone would have encountered this before.


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#2 Posted : Thursday, August 17, 2017 3:17:24 PM(UTC)

Joe Z

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Converting from a String to an L_TCHAR requires a few simple steps.

First, you must convert your existing String to a CString object using the c_str() function. This will give you a 'C' compatible string to work with. Note, a 'C' compatible string is a char array.

From here, you would then cast this array into a T_CHAR. Finally you can cast this T_CHAR array into an L_TCHAR to obtain your desired output. I'll include sample code of performing these steps below.

Code:


 string test = "C:\\Users\\Public\\Documents\\LEADTOOLS Images\\cannon.jpg";
 CString out = test.c_str();
 L_TCHAR* newout = (L_TCHAR*)((LPCTSTR)out);

Joe Zhan
Developer Support Engineer
LEAD Technologies, Inc.

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