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Code Issues Releases Wiki Activity

Added new SendMessage overload for WM_GETTEXT use case (#191).

pull/211/head
dahall 2020-12-31 10:50:54 -07:00
parent 06027d381a
commit feba58dafb
2 changed files with 42 additions and 4 deletions
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38
PInvoke/User32/WinUser.Message.cs
View File

@ -2065,7 +2065,7 @@ namespace Vanara.PInvoke
[DllImport(Lib.User32, SetLastError = false, CharSet = CharSet.Auto)]
[PInvokeData("Winuser.h", MSDNShortId = "ms644950")]
[System.Security.SecurityCritical]
public static extern IntPtr SendMessage(HWND hWnd, uint msg, IntPtr wParam = default, IntPtr lParam = default);
public static extern IntPtr SendMessage(HWND hWnd, uint msg, [In] IntPtr wParam = default, [In] IntPtr lParam = default);
/// <summary>
/// <para>
@ -2099,7 +2099,7 @@ namespace Vanara.PInvoke
[DllImport(Lib.User32, SetLastError = false, CharSet = CharSet.Auto)]
[PInvokeData("Winuser.h", MSDNShortId = "ms644950")]
[System.Security.SecurityCritical]
public static extern IntPtr SendMessage(HWND hWnd, uint msg, IntPtr wParam, string lParam);
public static extern IntPtr SendMessage(HWND hWnd, uint msg, [In] IntPtr wParam, string lParam);
/// <summary>
/// <para>
@ -2135,6 +2135,40 @@ namespace Vanara.PInvoke
[System.Security.SecurityCritical]
public static extern IntPtr SendMessage(HWND hWnd, uint msg, ref int wParam, [In, Out] StringBuilder lParam);
/// <summary>
/// <para>
/// Sends the specified message to a window or windows. The <c>SendMessage</c> function calls the window procedure for the specified
/// window and does not return until the window procedure has processed the message.
/// </para>
/// <para>
/// To send a message and return immediately, use the <c>SendMessageCallback</c> or <c>SendNotifyMessage</c> function. To post a
/// message to a thread's message queue and return immediately, use the <c>PostMessage</c> or <c>PostThreadMessage</c> function.
/// </para>
/// </summary>
/// <param name="hWnd">
/// <para>
/// A handle to the window whose window procedure will receive the message. If this parameter is <c>HWND_BROADCAST</c>
/// ((HWND)0xffff), the message is sent to all top-level windows in the system, including disabled or invisible unowned windows,
/// overlapped windows, and pop-up windows; but the message is not sent to child windows.
/// </para>
/// <para>
/// Message sending is subject to UIPI. The thread of a process can send messages only to message queues of threads in processes of
/// lesser or equal integrity level.
/// </para>
/// </param>
/// <param name="msg">
/// <para>The message to be sent.</para>
/// <para>For lists of the system-provided messages, see System-Defined Messages.</para>
/// </param>
/// <param name="wParam">Additional message-specific information.</param>
/// <param name="lParam">Additional message-specific information.</param>
/// <returns>The return value specifies the result of the message processing; it depends on the message sent.</returns>
// LRESULT WINAPI SendMessage( _In_ HWND hWnd, _In_ UINT Msg, _In_ WPARAM wParam, _In_ LPARAM lParam); https://msdn.microsoft.com/en-us/library/windows/desktop/ms644950(v=vs.85).aspx
[DllImport(Lib.User32, SetLastError = false, CharSet = CharSet.Auto)]
[PInvokeData("Winuser.h", MSDNShortId = "ms644950")]
[System.Security.SecurityCritical]
public static extern IntPtr SendMessage(HWND hWnd, uint msg, [In] IntPtr wParam, [In, Out] StringBuilder lParam);
/// <summary>
/// Sends the specified message to a window or windows. The SendMessage function calls the window procedure for the specified window
/// and does not return until the window procedure has processed the message.

8
UnitTests/PInvoke/User32/User32Tests.cs
View File

@ -2,6 +2,7 @@
using System;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using Vanara.InteropServices;
using static Vanara.PInvoke.User32;
@ -102,10 +103,13 @@ namespace Vanara.PInvoke.Tests
[Test()]
public void SendMessageTest1()
{
throw new NotImplementedException();
var length = 256;
var sb = new StringBuilder(length);
Assert.That(SendMessage(FindWindow("Progman", null), (uint)WindowMessage.WM_GETTEXT, (IntPtr)sb.Capacity, sb).ToInt32(), Is.GreaterThanOrEqualTo(1));
TestContext.WriteLine(sb);
}
[Test()]
[Test()]
public void SendMessageTest2()
{
throw new NotImplementedException();