CODEWITHSUNDEEP
c#windowscompact-framework.net-2.0windows-ce
user1514422
user1514422

Reputation: 21

Button on the win CE 6.0 device

On your device running win CE 6.0 is a button, and you need to catch the moment when it is pressed. That is, until we press the button, our method is performed, released - stop method. Please help with the solution of the problem.

Upvotes: 2

Views: 642

Answers (1)

andrew
andrew

Reputation: 1244

Here is a link to codeproject with source code to do what you want:

http://www.codeproject.com/Articles/49881/Hooking-the-keyboard-message-queue-in-compact-fram

I have used this code successfully in my own WM project to re-purpose volume keys and a few other hardware buttons (I use volume up/down on one screen as a trigger to flip the screen orientation).

There is too much code to post here. in the project is vkmap.cs which appears to be a comprehensive listing of all the keys available:

   public static vkMap[] vkValues = {
            new vkMap ( 0x00, "VK_NOTDEF"), 
            new vkMap ( 0x01, "VK_LBUTTON" ),
            new vkMap ( 0x02,"VK_RBUTTON" ),
            new vkMap ( 0x03,"VK_CANCEL" ),
...
            new vkMap ( 0x30,"VK_0" ),
            new vkMap ( 0x31,"VK_1" ),
...
            new vkMap ( 0x41,"VK_A" ),
...
            new vkMap ( 0xA6,"VK_BROWSER_BACK" ),
            new vkMap ( 0xA7,"VK_BROWSER_FORWARD" ),
            new vkMap ( 0xA8,"VK_BROWSER_REFRESH" ),

and so on.. all in all some 258 keys however some are marked as undefined.

To use the code: 

HookKeys hook = new HookKeys();
hook.HookEvent += new HookKeys.HookEventHandler(HookEvent);
hook.Start();

Then in your eventHandler code as you wish - I used a Switch statement to find the keys I wanted:

     switch (vkMap.vkValues[keyBoardInfo.vkCode].s)
        {
            case "VK_F6":
                if ((hookArgs.wParam.ToInt32() == WM_KEYDOWN) || (hookArgs.wParam.ToInt32() == WM_SYSKEYDOWN))
                // Code here
                break;
            case "VK_F7":
                if ((hookArgs.wParam.ToInt32() == WM_KEYDOWN) || (hookArgs.wParam.ToInt32() == WM_SYSKEYDOWN))
                 // Code here
                break;
            default:
                break;
        }

I can't recall why i'm also checking WM_KEYDOWN and WM_SYSKEYDOWN.. sorry about that; If I remember i'll post an edit.

And when you're finished needing input:

hook.Stop();

Upvotes: 2

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