Si, probe varios y no funciona, pero encontre una clase que importa el user32.dll e implementa esas constantes Win32.
Si a alguien le interesa dejo el codigo de la clase completa con los datos de su autor:
Código C#:
Ver originalusing System;
using System.Runtime.InteropServices;
using System.Drawing;
/// <summary>
/// Win32 support code.
/// </summary>
public class win32
{
public const int WM_MOUSEMOVE = 0x0200;
public const int WM_LBUTTONDOWN = 0x0201;
public const int WM_LBUTTONUP = 0x0202;
public const int WM_RBUTTONDOWN = 0x0204;
public const int WM_LBUTTONDBLCLK = 0x0203;
public const int WM_MOUSELEAVE = 0x02A3;
public const int WM_PAINT = 0x000F;
public const int WM_ERASEBKGND = 0x0014;
public const int WM_PRINT = 0x0317;
//const int EN_HSCROLL = 0x0601;
//const int EN_VSCROLL = 0x0602;
public const int WM_HSCROLL = 0x0114;
public const int WM_VSCROLL = 0x0115;
public const int EM_GETSEL = 0x00B0;
public const int EM_LINEINDEX = 0x00BB;
public const int EM_LINEFROMCHAR = 0x00C9;
public const int EM_POSFROMCHAR = 0x00D6;
[DllImport("USER32.DLL", EntryPoint= "PostMessage")]
public static extern bool PostMessage(IntPtr hwnd, uint msg,
IntPtr wParam, IntPtr lParam);
/*
BOOL PostMessage( HWND hWnd,
UINT Msg,
WPARAM wParam,
LPARAM lParam
);
*/
// Put this declaration in your class //IntPtr
[DllImport("USER32.DLL", EntryPoint= "SendMessage")]
public static extern int SendMessage(IntPtr hwnd, int msg, IntPtr wParam,
IntPtr lParam);
[DllImport("USER32.DLL", EntryPoint= "GetCaretBlinkTime")]
public static extern uint GetCaretBlinkTime();
const int WM_PRINTCLIENT = 0x0318;
const long PRF_CHECKVISIBLE=0x00000001L;
const long PRF_NONCLIENT = 0x00000002L;
const long PRF_CLIENT = 0x00000004L;
const long PRF_ERASEBKGND = 0x00000008L;
const long PRF_CHILDREN = 0x00000010L;
const long PRF_OWNED = 0x00000020L;
/* Will clean this up later doing something like this
enum CaptureOptions : long
{
PRF_CHECKVISIBLE= 0x00000001L,
PRF_NONCLIENT = 0x00000002L,
PRF_CLIENT = 0x00000004L,
PRF_ERASEBKGND = 0x00000008L,
PRF_CHILDREN = 0x00000010L,
PRF_OWNED = 0x00000020L
}
*/
public static bool CaptureWindow(System.Windows.Forms.Control control,
ref System.Drawing.Bitmap bitmap)
{
//This function captures the contents of a window or control
Graphics g2 = Graphics.FromImage(bitmap);
//PRF_CHILDREN // PRF_NONCLIENT
int meint = (int)(PRF_CLIENT | PRF_ERASEBKGND); //| PRF_OWNED ); // );
System.IntPtr meptr = new System.IntPtr(meint);
System.IntPtr hdc = g2.GetHdc();
win32.SendMessage(control.Handle,win32.WM_PRINT,hdc,meptr);
g2.ReleaseHdc(hdc);
g2.Dispose();
return true;
}
}