SysReAllocStringLen Function

Creates a new BSTR containing a specified number of characters from an old BSTR, and frees the old BSTR.

C++
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INT SysReAllocStringLen(  
  BSTR  *pbstr,  
  const OLECHAR  *psz, 
  unsigned int  cch  
);

pbstr

Pointer to a variable containing a BSTR.

psz

Pointer to string from which to copy cch number of characters, or NULL to keep the string uninitialized.

cch

Number of characters to copy from psz. A null character is placed afterward, allocating a total of cch plus one characters.

Value

Meaning

TRUE

The string is reallocated successfully.

FALSE

Insufficient memory exists.

Allocates a new string, copies cchcharacters from the passed string into it, and then appends a null character. Frees the BSTR referenced currently by pbstr, and resets pbstr to point to the new BSTR. If psz is Null, a string of length cch is allocated but not initialized.

The psz string can contain embedded null characters and does not need to end with a Null.

If this function is passed a NULL pointer, there will be an access violation and the program will crash. It is your responsibility to protect this function against NULL pointers.

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