SysAllocStringLen function (oleauto.h)

Allocates a new string, copies the specified number of characters from the passed string, and appends a null-terminating character.


BSTR SysAllocStringLen(
  [in] const OLECHAR *strIn,
  [in] UINT          ui


[in] strIn

The input string.

[in] ui

The number of characters to copy. A null character is placed afterwards, allocating a total of ui plus one characters.

Return value

A copy of the string, or NULL if there is insufficient memory to complete the operation.


The string can contain embedded null characters and does not need to end with a NULL. Free the returned string later with SysFreeString. If strIn is not NULL, then the memory allocated to strIn must be at least ui characters long.

Note  This function does not convert a char * string into a Unicode BSTR.


Requirement Value
Target Platform Windows
Header oleauto.h
Library OleAut32.lib
DLL OleAut32.dll

See also

String Manipulation Functions