Copies the contents of a managed SecureString object to a block of memory allocated from the unmanaged COM task allocator.
Assembly: mscorlib (in mscorlib.dll)
- Type: System.Security.SecureString
The managed object to copy.
Return ValueType: System.IntPtr
The address, in unmanaged memory, where the s parameter was copied to, or 0 if a null object was supplied.
The method is useful for custom marshaling or when mixing managed and unmanaged code. Because this method allocates the unmanaged memory required for a string, always free the memory by calling ZeroFreeCoTaskMemAnsi. The characters of the string are copied as ANSI characters.Notes to Callers
This method is supported only on computers running Windows 2000 Service Pack 3 or later.
The following example uses the method to marshal and decrypt the contents of a SecureString object to a block of unmanaged memory. It then uses the ZeroFreeCoTaskMemAnsi method to zero out and dispose the unmanaged block.
requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.