Multibytetowidechar logic problem

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C++

MFC

iam converting some ansi hebrew string to unicode string by using
following method:


nSize = MultiByteToWideChar(nlanguageCodePage, 0, chAnsiBuff, -1, NULL, 0);

MultiByteToWideChar(nlanguageCodePage, 0, chAnsiBuff, -1, chUniocodeBuff, 512);


iam having hebrew - ( windows code page 1255) so i will get 1255 ....if any junk characters are there in ansi it will dispalay correclty in unicode ?

what exactly this will do ( i.e first parameter will do if i willspecify hebrew still its converting proeprly)

please let me know the why its not working

What I have tried:

//CONVERTING TO UNICODE
nSize = MultiByteToWideChar(nlanguageCodePage, 0, chAnsiBuff, -1, NULL, 0);
MultiByteToWideChar(nlanguageCodePage, 0, chAnsiBuff, -1, chUniocodeBuff, 512);

// bom at starting
if (nBOM == 0) { arcOut.Write(&bom, 2); }
arcOut.WriteString(chUniocodeBuff);