AxAcroPDF swallows the keys, how to make it stop?

Question

AxAcroPDF swallows all key-related events as soon as it receives focus, including shortcuts, keystrokes, etc. I added a message filter, and it also does not receive any messages related to keys. This is a COM component, can it be relevant?

Is there a way to catch them before the control swallows them?

Answer 1

Hans is right, Acrobat Reader spawns two AcroRd32 child processes with which you do not have direct access from your managed code.

I experimented with this, and you have three viable options:

• , / WM_SETFOCUS, AcroRd32. # , , : http://www.codeproject.com/KB/system/WilsonSystemGlobalHooks.aspx

  , AcroRd32. , , , , .

• PDF. . : .net PDF : http://www.codeproject.com/KB/applications/PDFViewerControl.aspx

• . , , (, ):

  DateTime _lastRenav = DateTime.MinValue;
  
  public Form1()
  {
      InitializeComponent();
  
      listBox1.LostFocus += new EventHandler(listBox1_LostFocus);
  }
  
  private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
  {
      axAcroPDF1.src = "sample.pdf";  //this will cause adobe to take away the focus
      _lastRenav = DateTime.Now;
  }
  
  void listBox1_LostFocus(object sender, EventArgs e)
  {
      //restores focus if it were the result of a listbox navigation
      if ((DateTime.Now - _lastRenav).TotalSeconds < 1)
          listBox1.Focus();
  }
  

Answer 2

, , . .

, , ( acropdf ), ( ). .

, (acropdf) , ( )

AxAcroPDF_this.Enabled = False AxAcroPDF_this.src= m_src

, , 1 .

AxAcroPDF_this.Enabled = False

, , Windows, acropdf , , Windows ( ).

, , - . , , , .

Answer 3

COM , . Windows SDK, SetParent(). , acroread.exe , .

SetWindowsHookEx(), DLL WH_GETMESSAGE. ​​DLL #.

, . , .

Answer 4

- , AxAcroPDF , . "" .

, AxAcroPDF GroupBox. PDF, , GroupBox Enabled False .