ATL / WTL / STL

Using events of JScript in ATL COM DLL?

29-May-08 21:37

By STL, do you mean this[^]? Because the STL discussed in this forum is this one[^], which is very different. If this is the case, I suspect you're not going to get any useful responses Frown | :-(

ritz123422-May-08 0:30

ritz1234

22-May-08 0:30

Hello dear friends,

How can we use the events of the JScript in ATL COM DLL?

Application scenario:

I've toolbar which is written in ATL.I want the toolbar to communicate with the the JScript.For example in Google toolbar you can add new button in the toolbar by clicking a button on the webpage.

I've webpage and when user pressed for example a link, I want that my
toolbar should be informed of this thing with the name of the link pressed to the toolbar.

A sample code is greatly appreciated.

ritz1234

Checkbox and Listbox question

monsieur_jj21-May-08 22:32

21-May-08 22:32

Hi all,

How do I manipulate a checkbox?

I declared it as:

bool Check;

 BEGIN_DDX_MAP(CPreferenceDlg)
		 DDX_CHECK(IDC_CHECK1, Check)
	 END_DDX_MAP()

How can I know if the checkbox is checked or not? If CComboBox is for combo box what is for a check box and listbox? How will I also declare a listbox?

This is what I do if its a textbox:

c_edEdit4.GetLine(0, Mail.GetBuffer(c_edEdit4.LineLength(0)));
		Mail.ReleaseBuffer();
		Email = Mail;

		if (RegSetValueEx(Regentry,             // subkey handle 
          _T("EmailAddress"),        // value name 
          0,                         // must be zero 
          REG_SZ,             // value type 
          (LPBYTE) Email.c_str(),          // pointer to value data 
          (DWORD) (lstrlen(Email.c_str())+1)*sizeof(TCHAR))) // data size
		   {
			  printf("Could not set the event message file."); 
			  RegCloseKey(Regentry); 
			  return 0;
		   }

Thanks,
Jayjay

monsieur_jj22-May-08 16:24

22-May-08 16:24

I got it how i will get the value of the checkbox. Another question though. Now I am able to save at the registry if the checkbox is checked or not question is how can I make the checkbox checked already if it was saved as checked.

Stuart Dootson22-May-08 22:22

22-May-08 22:22

If you're using WTL/MFC and you've wrapped the control in a WTL/MFC CButton class, you use the SetCheck methods.

If you're using raw Win32, send the BM_SETCHECK message to the control's window.

monsieur_jj25-May-08 16:39

25-May-08 16:39

Hi Stuart,

Thank I now got it sorted. Now arise another puzzle for me, with a checkbox unchecked I will have to disable two comboboxes, now how can I enable and disable it everytime the checkbox is being checked and unchecked.

Thanks,
Jj

Stuart Dootson26-May-08 12:30

26-May-08 12:30

1. In the checkbox's 'OnClick' handler, enable/disable the combo-boxes.
2. If you're using WTL, check out this article[^].

CButton question

monsieur_jj20-May-08 19:43

20-May-08 19:43

I made this button thats supposed to open an choose folder window then the user will choose a folder or create a folder where the files will be saved then the address of the folder after the user chooses will be put into a text box.
Any ideas how to do that?

Thanks

Stuart Dootson20-May-08 20:27

20-May-08 20:27

If you're using WTL, then you want CFolderDialog - see Michael Dunn's excellent article[^].

Otherwise, You need SHBrowseForFolder[^] for the whole choosing/creating a folder thing. I'll give you 10 extra bonus points if you can get it to start up displaying a folder of your choice (hint: you need to register a callback in the lpfn member of the structure whose address you pass as a parameter, and that callback needs to respond to BFFM_INITIALIZED by sending the BFFM_SETSELECTION with the folder).

Oh, and retrieving the folder that was selected? Yeah, you'll need to get friendly with PIDLs.

Alternatively, you could use the nice, easy to use wrapper for SHBrowseForFolder from this CP article[^]. Might be a little easier than using SHBrowseForFolder yourself.

monsieur_jj21-May-08 15:43

21-May-08 15:43

Now i am having trouble with this:

BufferSize = TOTALBYTES;
		PPERF_DATA_BLOCK PerfData = (PPERF_DATA_BLOCK) malloc( BufferSize );
		Size = BufferSize;

		dwRet = RegQueryValueEx(Regentry, _T("DownloadPath"), NULL, &Type, reinterpret_cast<LPBYTE>(DownloadPath), &Size);
		while( dwRet == ERROR_MORE_DATA )
		{
        // Get a buffer that is big enough.

        BufferSize += BYTEINCREMENT;
        PerfData = (PPERF_DATA_BLOCK) realloc( PerfData, BufferSize );
        Size = BufferSize;
		dwRet = RegQueryValueEx(Regentry, _T("DownloadPath"), NULL, &Type, reinterpret_cast<LPBYTE>(DownloadPath), &Size);
		}
		if( dwRet == ERROR_SUCCESS )
		{
			Path = DownloadPath;
		}
		else if ( dwRet == ERROR_FILE_NOT_FOUND )
		{
			if (RegSetValueEx(Regentry,      // subkey handle 
				   _T("DownloadPath"),  // value name 
				   0,                 // must be zero 
				   REG_SZ,         // value type 
				  (LPBYTE) &dwData,          // pointer to value data 
				  (DWORD) (lstrlen(Path.c_str())+1)*sizeof(TCHAR))) // data size
		   {
			  printf("Could not set the DownloadPath."); 
			  RegCloseKey(Regentry); 
			  return 0;
		   }
		}
		else
		{
		printf("Could not set the DownloadPath."); 
			  RegCloseKey(Regentry); 
			  return 0;
		}

I am getting 'PPERF_DATA_BLOCK' : undeclared identifier, what can I do for that? What do I need to include?

These are my headers:

#include <atlapp.h>
#include <atlframe.h>
#include <atlctrls.h>
#include <atldlgs.h>
#include <atlctrlw.h>
#include <atlwin.h>
#include <iostream>
#include <atlmisc.h>
#include <malloc.h>
#include <stdio.h>
#include <windows.h>
#include <stdlib.h>
#include <string.h>

Stuart Dootson21-May-08 20:53

21-May-08 20:53

Looking at PERF_DATA_BLOCK in MSDN, it says 'Header: Declared in Winperf.h; include Windows.h.'.

You have included Windows.h, which makes me suspect there's a macro getting in the way. Looking at Windows.h, it won't include WinPerf.h if the macro WIN32_LEAN_AND_MEAN is defined - I seem to remember that an auto-generated stdafx.h does define WIN32_LEAN_AND_MEAN. Check for that.

PS - I compiled this code successfully (just these two lines) using the command-line C++ compiler, which says that there must be something in your setup or software that's stopping PPERF_DATA_BLOCK being defined.

#include <Windows.h>
PPERF_DATA_BLOCK p = new PERF_DATA_BLOCK;

monsieur_jj21-May-08 22:25