[DllImport("User32.dll")] have errors

Question

2.00/5 (1 vote)

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#define DEBUG
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;



      static void Main(string[] args)
        {
            [DllImport("User32.dll")]
            // All errors from this ^|^
            //                       |
Error	1	} expected           C:\Program.cs	13	38	Project-229
Error	2	Invalid expression term '['	C:\Program.cs	13 13	Project-229
Error	3	; expected                    C:\Program.cs	13 14	Project-229
Error	4	; expected	                  C:\Program.cs	13 37	Project-229
Error	5	Invalid expression term ']'	C:\Program.cs	13 37	Project-229
Error	6	; expected	                  C:\Program.cs	13 38	Project-229

Posted 6-Aug-10 17:04pm

Eddy Ho 88 from Singapore

Updated 6-Aug-10 17:14pm

Abhinav S

v2

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Toli Cuturicu 8-Aug-10 6:47am

Reason for my vote of 2
No imported function!

2 solutions

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Mike$7 · Answer 1 · 2010-08-06T17:15:00

Solution 1

What function are you trying to import?

Check out http://www.pinvoke.net/ for examples and such.

Posted 6-Aug-10 17:15pm

Mike$7

Comments

DaveyM69 7-Aug-10 10:26am

pinvoke.net is a good guide - be careful though as there are many incorrect submissions on there. The most common mistake I've found is using int instead of IntPtr. This will be OK normally on 32 systems, but has a reasonably high probability of failing if ever run on a 64bit OS.
Moral: Check the signatures against those declared in the relavent C/C++ header file or MSDN page and correct if needed.

DaveyM69 · Answer 2 · 2010-08-07T04:22:00

Your function declarations (like any other methods) need to be declared at the class level. You cannot declare them within another method.

In other words, do it outside of your Main method. As you are calling native functions, the standard is to declare a class called NativeMethods and put them in there.