unfocusable form C#

Question

I need to create unfocusable form in C#. On that form there will be button. After pressing that button I want to paste content of System.Clipboard to the place where the cursot is. This is what I have till now:

 public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    const int WS_EX_NOACTIVATE = 0x08000000;
    const int WS_EX_TOPMOST = 0x00000008;
    const int WS_EX_TOOLWINDOW = 0x00000080;
    const int WM_MOUSEACTIVATE = 0x0021;
    const int WS_EX_WINDOWEDGE = 0x00000100;
    const int MA_NOACTIVATEANDEAT = 4;
    const int WM_NCHITTEST = 0x0084;
    //const int WM_ACTIVATEAPP = 0x001C;
    const int WS_THICKFRAME = 0x00040000;
    const int WS_CHILD = 0x40000000;
    const int WS_BORDER = 0x00800000;
    const int WS_DLGFRAME = 0x00400000;
    const int WS_CAPTION = WS_BORDER | WS_DLGFRAME;
    const int WS_SYSMENU = 0x00080000;

    protected override bool ShowWithoutActivation { get { return true; } }

    protected override CreateParams CreateParams
    {
        get
        {
            CreateParams ret = base.CreateParams;
            ret.Style = WS_THICKFRAME |
               WS_CHILD | 
                WS_CAPTION | 
                WS_SYSMENU;
            ret.ExStyle |= WS_EX_NOACTIVATE | 
                WS_EX_TOOLWINDOW |
                WS_EX_TOPMOST | 
                WS_EX_WINDOWEDGE;
            ret.X = this.Location.X;
            ret.Y = this.Location.Y;
            return ret;
        }
    }

    private void simpleButton1_Click(object sender, EventArgs e)
    {
        Clipboard.SetText("text1 text2");
        SendKeys.SendWait("^v");
    }
}

The form is not the main form of my application. The code works only if the focus is in my application. If I focus notepad or any other program clipboard content is not pasted to it. Any one can help with this?

"After pressing that button I want to paste content of System.Clipboard to the place where the cursor is." - I don't understand this requirement: Surely the cursor will always be over the button that you just pressed? Or do you mean that you press the button via the keyboard? — Matthew Watson, Sep 25 '12 at 08:27
I don't meen Mouse cursor, but place where keyboard input was last placed. — Pablo notPicasso, Sep 25 '12 at 09:14
If the form will not steel focus, I will be able to paste text from clipboard to current window. This works but only inside my application. — Pablo notPicasso, Sep 25 '12 at 10:14

score 0 · Answer 1 · edited May 23 '17 at 12:04

0

I think at first you must determ a window to send a keystroke.

I found a good sample at codeproject and many questions here: 1 and other

edited May 23 '17 at 12:04

Community

1
1

answered Sep 25 '12 at 08:28

Ivan Kochurkin

4,413
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Thanks, but I already read that. The problem is with identifying prevoius program. – Pablo notPicasso Sep 26 '12 at 07:32

score 0 · Answer 2 · edited May 23 '17 at 12:12

0

Learn to title your questions properly. I believe you are looking for a clipboard monitor snippet. You will have to register your appplication to intercept clipboard changed events.

[DllImport("User32.dll", CharSet=CharSet.Auto)]
public static extern IntPtr SetClipboardViewer(IntPtr hWndNewViewer);

_ClipboardViewerNext = SetClipboardViewer(this.Handle);

protected override void WndProc(ref Message m)
{
    switch ((Win32.Msgs)m.Msg)
    {
        case Win32.Msgs.WM_DRAWCLIPBOARD:
        // Handle clipboard changed
        break;
        // ... 
   }
}

See this answer and this article.

edited May 23 '17 at 12:12

Community

1
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answered Sep 25 '12 at 09:24

Chibueze Opata

9,856
7
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This is not what I want. I want to paste text from clipboard to the window that has focus. For example if I have notepad opened and i click Paste button on my form, text from clipboard should be pasted to notepad. – Pablo notPicasso Sep 25 '12 at 10:17

Deanna · Answer 3 · 2012-09-26T07:57:12.423

0

When your application receives focus, it will be sent the WM_ACTIVATE or WM_ACTIVATEAPP messages which contain the previous focused window handle. You can then set the focus back using SetActiveWindow. You should still receive the click as usual.

edited Sep 26 '12 at 07:57

answered Sep 25 '12 at 09:57

Deanna

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Unfortunately this works only inside my application. If the focus was in other program, than WM_ACTIVATE does not have information about that program. – Pablo notPicasso Sep 26 '12 at 07:31

unfocusable form C#

3 Answers3