C#

[DllImport("kernel32.dll")]
static extern bool WriteProcessMemory(
     IntPtr hProcess,
     IntPtr lpBaseAddress,
     byte[] lpBuffer,
     Int32 nSize,
     out IntPtr *lpNumberOfBytesWritten
);

Note the "out" datatype; in your call, use out keyword in your parameter to pass the variable by reference instead of value, ex.,

IntPtr outSz;
WriteProcessMemory(hProcess,lpBaseAddress, lpBuffer, nSize, out outSz);

VB.NET Signature:

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).