// THIS FILE IS PART OF Vanara PROJECT
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// THE Vanara PROJECT IS AN OPENSOURCE LIBRARY LICENSED UNDER THE MIT License.
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// COPYRIGHT (C) dahall. ALL RIGHTS RESERVED.
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// GITHUB: https://github.com/dahall/Vanara
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using System.Drawing;
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using System.Runtime.InteropServices;
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namespace Vanara.PInvoke
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{
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public static partial class User32
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{
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/// <summary>The <c>ClientToScreen</c> function converts the client-area coordinates of a specified point to screen coordinates.</summary>
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/// <param name="hWnd">A handle to the window whose client area is used for the conversion.</param>
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/// <param name="lpPoint">
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/// A pointer to a POINT structure that contains the client coordinates to be converted. The new screen coordinates are copied into
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/// this structure if the function succeeds.
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/// </param>
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/// <returns>
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/// <para>If the function succeeds, the return value is nonzero.</para>
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/// <para>If the function fails, the return value is zero.</para>
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/// </returns>
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/// <remarks>
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/// <para>
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/// The <c>ClientToScreen</c> function replaces the client-area coordinates in the POINT structure with the screen coordinates. The
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/// screen coordinates are relative to the upper-left corner of the screen. Note, a screen-coordinate point that is above the
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/// window's client area has a negative y-coordinate. Similarly, a screen coordinate to the left of a client area has a negative x-coordinate.
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/// </para>
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/// <para>All coordinates are device coordinates.</para>
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/// <para>Examples</para>
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/// <para>For an example, see "Drawing Lines with the Mouse" in Using Mouse Input.</para>
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/// </remarks>
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// https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-clienttoscreen BOOL ClientToScreen( HWND hWnd, LPPOINT
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// lpPoint );
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[DllImport("user32.dll", SetLastError = false, ExactSpelling = true)]
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[PInvokeData("winuser.h", MSDNShortId = "3b1e2699-7f5f-444d-9072-f2ca7c8fa511")]
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[return: MarshalAs(UnmanagedType.Bool)]
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public static extern bool ClientToScreen(HWND hWnd, ref Point lpPoint);
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/// <summary>The ScreenToClient function converts the screen coordinates of a specified point on the screen to client-area coordinates.</summary>
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/// <param name="hWnd">A handle to the window whose client area will be used for the conversion.</param>
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/// <param name="lpPoint">A pointer to a POINT structure that specifies the screen coordinates to be converted.</param>
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/// <returns>
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/// If the function succeeds, the return value is true. If the function fails, the return value is false. To get extended error
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/// information, call GetLastError.
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/// </returns>
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[DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
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[return: MarshalAs(UnmanagedType.Bool)]
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[System.Security.SecurityCritical]
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public static extern bool ScreenToClient(HWND hWnd, [In, Out] ref Point lpPoint);
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}
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}
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