title: Using C code in c#
body: <p>When i googled to find the way to change the window style i could find the code in "C" language
  How can i use the snippet below in my c# application, so that i can hide the Title Bar of external application ? I have not used "C" before..</p>
  
  <pre><code>    //Finds a window by class name
  [DllImport("USER32.DLL")]
  public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
  
  //Sets a window to be a child window of another window
  [DllImport("USER32.DLL")]
  public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
  
  //Sets window attributes
  [DllImport("USER32.DLL")]
  public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
  
  //Gets window attributes
  [DllImport("USER32.DLL")]
  public static extern int GetWindowLong(IntPtr hWnd, int nIndex);
  
  //assorted constants needed
  public static int GWL_STYLE = -16;
  public static int WS_CHILD = 0x40000000; //child window
  public static int WS_BORDER = 0x00800000; //window with border
  public static int WS_DLGFRAME = 0x00400000; //window with double border but no title
  public static int WS_CAPTION= WS_BORDER | WS_DLGFRAME; //window with a title bar
  
  /*
   This function sets the parent of the window with class
   ClassClass to the form/control the method is in.
  */
  public void Reparent()
  {
  //get handle of parent form (.net property)
  IntPtr par = this.Handle;
  //get handle of child form (win32)
  IntPtr child = FindWindow("ClassClass", null);
  //set parent of child form
  SetParent(child, par);
  //get current window style of child form
  int style = GetWindowLong(child, GWL_STYLE);
  
  //take current window style and remove WS_CAPTION from it
  SetWindowLong(child, GWL_STYLE, (style &amp; ~WS_CAPTION));
  }
  </code></pre>