datagridview - Pressing Ctrl + C on computer.keyboard -


so building tool called "clipboard history"

my target is, when copy anywhere(web, pc text etc) want add my.computer.clipboard datagridview.

everything fine need command or recognizing ctrl + c (in pckeyboard, not form active) , once (form1.datagridview1.rows.add(dateandtime.now, clipboard.gettext)

    private sub timer2_tick(sender object, e eventargs) handles timer2.tick     dim keydata keys     if my.computer.keyboard.ctrlkeydown andalso keydata.c         form1.datagridview1.rows.add(dateandtime.now, clipboard.gettext)      end if end sub

thank :)

there no standard .net library know of can accomplish want. using windows api function addclipboardformatlistener can receive notification of items placed on clipboard.

addclipboardformatlistener requires window handle send notification. use class derived system.windows.forms.nativewindow listen wm_clipboardupdate. class defined below, expose event named clipboarddataavailable can subscribed , passed argument dataobject can used retrieve clipboard contents.

imports system.runtime.interopservices  public class clipboardlistener : inherits nativewindow     implements idisposable     public event clipboarddataavailable(data dataobject)      public sub new()         me.createhandle(new createparams())         addclipboardformatlistener(me.handle)     end sub      public overrides sub destroyhandle()         me.dispose()         mybase.destroyhandle()     end sub      protected overrides sub wndproc(byref m message)         const wm_clipboardupdate int32 = &h31d         if m.msg = wm_clipboardupdate             dim data dataobject = ctype(clipboard.getdataobject, dataobject)             raiseevent clipboarddataavailable(data)         end if         mybase.wndproc(m)     end sub      <dllimport("user32.dll", setlasterror:=true)> _     public shared function addclipboardformatlistener(hwnd intptr) <marshalas(unmanagedtype.bool)> boolean     end function      <dllimport("user32.dll", setlasterror:=true)> _     public shared function removeclipboardformatlistener(hwnd intptr) <marshalas(unmanagedtype.bool)> boolean     end function  #region "idisposable support"     private disposedvalue boolean ' detect redundant calls      ' idisposable     protected overridable sub dispose(disposing boolean)         if not me.disposedvalue             removeclipboardformatlistener(me.handle)         end if         me.disposedvalue = true     end sub      ' todo: override finalize() if dispose(byval disposing boolean) above has code free unmanaged resources.     protected overrides sub finalize()          ' not change code.  put cleanup code in dispose(byval disposing boolean) above.          dispose(false)          mybase.finalize()     end sub      ' code added visual basic correctly implement disposable pattern.     public sub dispose() implements idisposable.dispose         ' not change code.  put cleanup code in dispose(disposing boolean) above.         dispose(true)         gc.suppressfinalize(me)     end sub #end region  end class

example usage:

public class form1     private withevents listener new clipboardlistener      private sub listener_clipboarddataavailable(data dataobject) handles listener.clipboarddataavailable         if data.containstext debug.print(data.gettext)     end sub end class

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