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POC# - Sending messages to Google Chrome from C# application
 

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    <p>I've been searching around, and I haven't found how I would do this from C#.</p> <p>I was wanting to make it so I could tell Google Chrome to go <strong>Forward</strong>, <strong>Back</strong>, <strong>Open New Tab</strong>, <strong>Close Tab</strong>, <strong>Open New Window</strong>, and <strong>Close Window</strong> from my C# application.</p> <p>I did something similar with WinAmp using</p> <pre><code>[DllImport("user32", EntryPoint = "SendMessageA")] private static extern int SendMessage(int Hwnd, int wMsg, int wParam, int lParam); </code></pre> <p>and a a few others. But I don't know what message to send or how to find what window to pass it to, or anything. </p> <p>So could someone show me how I would send those 6 commands to Chrome from C#? thanks</p> <p>EDIT: Ok, I'm getting voted down, so maybe I wasn't clear enough, or people are assuming I didn't try to figure this out on my own.</p> <p>First off, I'm not very good with the whole DllImport stuff. I'm still learning how it all works.</p> <p>I found how to do the same idea in winamp a few years ago, and I was looking at my code. I made it so I could skip a song, go back, play, pause, and stop winamp from my C# code. I started by importing:</p> <pre><code> [DllImport("user32.dll", CharSet = CharSet.Auto)] public static extern IntPtr FindWindow([MarshalAs(UnmanagedType.LPTStr)] string lpClassName, [MarshalAs(UnmanagedType.LPTStr)] string lpWindowName); [DllImport("user32.dll", CharSet = CharSet.Auto)] static extern int SendMessageA(IntPtr hwnd, int wMsg, int wParam, uint lParam); [DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)] public static extern int GetWindowText(IntPtr hwnd, string lpString, int cch); [DllImport("user32", EntryPoint = "FindWindowExA")] private static extern int FindWindowEx(int hWnd1, int hWnd2, string lpsz1, string lpsz2); [DllImport("user32", EntryPoint = "SendMessageA")] private static extern int SendMessage(int Hwnd, int wMsg, int wParam, int lParam); </code></pre> <p>Then the code I found to use this used these constants for the messages I send.</p> <pre><code> const int WM_COMMAND = 0x111; const int WA_NOTHING = 0; const int WA_PREVTRACK = 40044; const int WA_PLAY = 40045; const int WA_PAUSE = 40046; const int WA_STOP = 40047; const int WA_NEXTTRACK = 40048; const int WA_VOLUMEUP = 40058; const int WA_VOLUMEDOWN = 40059; const int WINAMP_FFWD5S = 40060; const int WINAMP_REW5S = 40061; </code></pre> <p>I would get the <em>hwnd</em> (the program to send the message to) by:</p> <pre><code>IntPtr hwnd = FindWindow(m_windowName, null); </code></pre> <p>then I would send a message to that program:</p> <pre><code>SendMessageA(hwnd, WM_COMMAND, WA_STOP, WA_NOTHING); </code></pre> <p>I assume that I would do something very similar to this for Google Chrome. but I don't know what some of those values should be, and I googled around trying to find the answer, but I couldn't, which is why I asked here. So my question is how do I get the values for:</p> <p><strong>m_windowName</strong> and <strong>WM_COMMAND</strong></p> <p>and then, the values for the different commands, <strong>forward</strong>, <strong>back</strong>, <strong>new tab</strong>, <strong>close tab</strong>, <strong>new window</strong>, <strong>close window</strong>?</p>
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