public void ShowSymbol(CursorNames c)
{
switch(c)
{
case CursorNames.None:
cursor_index = 0;
break;
case CursorNames.Identify:
cursor_index = 1;
break;
case CursorNames.Use:
cursor_index = 2;
break;
case CursorNames.Talk:
cursor_index = 3;
break;
}
}
/// <summary>
/// Enables an application to customize the system cursors. It replaces the contents of the system cursor
/// specified by the id parameter with the contents of the cursor specified by the curHwnd parameter and then
/// destroys curHwnd.
/// </summary>
/// <param name="curHwnd">
/// A handle to the cursor. The function replaces the contents of the system cursor
/// specified by id with the contents of the cursor handled by curHwnd.
/// </param>
/// <param name="id">The system cursor to replace with the contents of curHwnd.</param>
/// <param name="destroyCur">Specify whether the cursor handle is destroyed.</param>
/// <returns>True if succeed; false otherwise.</returns>
public static bool TrySetSystemCursor(IntPtr curHwnd, CursorNames id, bool destroyCur)
{
if ((destroyCur && !SetSystemCursor(curHwnd, id) ||
(!destroyCur && !SetSystemCursor(CopyCursor(curHwnd), id))))
{
return false;
}
return true;
}
/// <summary>
/// Enables an application to customize the system cursors. It replaces the contents of the system cursor specified by
/// the id parameter with the contents of the cursor specified by the curHwnd parameter and then destroys curHwnd.
/// </summary>
/// <param name="curHwnd">
/// A handle to the cursor. The function replaces the contents of the system cursor specified by id
/// with the contents of the cursor handled by curHwnd.
/// </param>
/// <param name="id">The system cursor to replace with the contents of curHwnd.</param>
/// <param name="preCur">
/// If the function succeeds, the return value is the handle to the previous cursor, if there was one.
/// <para>If there was no previous cursor, the return value is NULL.</para>
/// </param>
/// <param name="destroyCur">Specify whether the cursor handle is destroyed.</param>
/// <returns>True if succeed; false otherwise.</returns>
public static bool TrySetSystemCursor(IntPtr curHwnd, CursorNames id, out IntPtr preCur, bool destroyCur)
{
preCur = CopyCursor(GetSystemCursor(id));
var currentCursor = SetCursor(curHwnd);
if ((destroyCur && !SetSystemCursor(curHwnd, id) ||
(!destroyCur && !SetSystemCursor(CopyCursor(curHwnd), id))))
{
DestroyCursor(preCur);
return false;
}
return true;
}
/// <summary>
/// Enables an application to customize the system cursors. It replaces the contents of the system cursor
/// specified by the id parameter with the contents of the cursor specified by the curHwnd parameter and then
/// destroys curHwnd.
/// </summary>
/// <param name="curHwnd">
/// A handle to the cursor. The function replaces the contents of the system cursor
/// specified by id with the contents of the cursor handled by curHwnd.
/// </param>
/// <param name="id">The system cursor to replace with the contents of curHwnd.</param>
/// <param name="preCur">
/// If the function succeeds, the return value is the handle to the previous cursor, if there
/// was one.
/// <para>If there was no previous cursor, the return value is NULL.</para>
/// </param>
/// <param name="destroyCur">Specify whether the cursor handle is destroyed.</param>
public static void SetSystemCursor(IntPtr curHwnd, CursorNames id, out IntPtr preCur, bool destroyCur)
{
/*preCur = CopyCursor(GetSystemCursor(id));
IntPtr currentCursor = SetCursor(curHwnd);
if ((destroyCur && !SetSystemCursor(curHwnd, id) || (!destroyCur && !SetSystemCursor(CopyCursor(curHwnd), id))))
{
DestroyCursor(preCur);
throw new Win32Exception(Marshal.GetLastWin32Error());
}*/
if (!TrySetSystemCursor(curHwnd, id, out preCur, destroyCur))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
/// <summary>
/// Enables an application to customize the system cursors. It replaces the contents of the system cursor
/// specified by the id parameter with the contents of the cursor specified by the curHwnd parameter and then
/// destroys curHwnd.
/// </summary>
/// <param name="curHwnd">
/// A handle to the cursor. The function replaces the contents of the system cursor
/// specified by id with the contents of the cursor handled by curHwnd.
/// </param>
/// <param name="id">The system cursor to replace with the contents of curHwnd.</param>
/// <param name="destroyCur">Specify whether the cursor handle is destroyed.</param>
public static void SetSystemCursor(IntPtr curHwnd, CursorNames id, bool destroyCur)
{
/*if ((destroyCur && !SetSystemCursor(curHwnd, id) || (!destroyCur && !SetSystemCursor(CopyCursor(curHwnd),id))))
throw new Win32Exception(Marshal.GetLastWin32Error());*/
}
/// <summary>
/// Load one of the predefined cursors
/// </summary>
/// <param name="name">Name of the predefined cursors</param>
public static IntPtr GetSystemCursor(CursorNames name)
{
return LoadCursor(IntPtr.Zero, name);
}
public static extern bool SetSystemCursor(IntPtr hcur, CursorNames id);
public static extern IntPtr LoadCursor(IntPtr hInstance, CursorNames lpCursorName);
