Thanks for all immediate reply,
We can use the BAPISDTEXT, but the problem is TEXT_LINE length is only 132 char (TEXT_LINE TDLINE CHAR 132 Text Line ) but in standard item text there is no limit, My requirement also minimum 400 character and also one more in doubt in this structure BAPISDTEXT no OBJECT ID field.
Please suggest me this structure really helpful for my requirement? if it's helpful kindly send sample code or shall i use SAVE_TEXT? suggestion highly appreciable..