C / C++ / MFC Discussion Boards

Update Statusbar from a non-window class method.

oRion23-Sep-02 3:05

23-Sep-02 3:05

I have written a class in a seperate file which I want access to the statusbar. How do I change the message in the statusbar from this class? I have included the "stdafx.h" in the class I defined.

Confused | :confused:

Re: Update Statusbar from a non-window class method.

jhwurmbach23-Sep-02 3:54

jhwurmbach

23-Sep-02 3:54

If what you want is a value being displayed in the status bar (like coordiantes in a picture-editor), try this:
You set a variable in your CDocument class.
This variable is then displayed via a ON_COMMAND_UPDATE_UI-handler in either your main frame or your view.

Re: Update Statusbar from a non-window class method.

oRion23-Sep-02 4:07

oRion

23-Sep-02 4:07

Thanks for your reply, jhwurmbach!

I think I have to repharase my question. I have written a class method which does all the screen output, but the output is onto the screen via "cout". Now, I am trying to rewrite this class such that I could output my message onto the statusbar in windows instead. I understand that "CView" is the one that handles the output in windows. I am trying to change my original DOS-output class to a windows-output class one. I hope u can understand what I am trying to say. U have any suggestion?
Roll eyes | :rolleyes:

Re: Update Statusbar from a non-window class method.

jhwurmbach23-Sep-02 4:27

jhwurmbach

23-Sep-02 4:27

You don't want to simplay have a 'logging' style output in a Window (for that, try searching the site), you want to show one output line in the status bar, right?
Do we talk about the same 'StatusBar'-thing?
I talk about he same bar that in IE contains the little globe and the 'Internet' text at the right bottom of the window. in the same bar, with SSE-connection, a little yellow lock shows up.
So, probably it is really easiest to let your class-method set a variable in the dochument and show that variable via ON_UPDTE_COMMNAND_UI.

Re: Update Statusbar from a non-window class method.

Andreas Saurwein23-Sep-02 4:47

Andreas Saurwein

23-Sep-02 4:47

AfxGetMainWnd()->SetMessageText();

...make it about Visual C++, and don't ever mention Visual Basic. Nick Hodapp (MSFT) in Semicolon[^]

Re: Update Statusbar from a non-window class method.

oRion24-Sep-02 3:43

oRion

24-Sep-02 3:43

Thanks for your reply. I have tried to use that statement u mention. It can't work, apparently SetMessageText is not a member of AfxGetMainWnd().

Confused | :confused:

InvokeHelper question

ns23-Sep-02 3:05

23-Sep-02 3:05

I have a VB dll, and a VC client. In this snippet of code from the client :

BOOL _CRemoteCall::MoveProgressBarX(long hPBHWND, long iMin, long iMax)
{
	BOOL result;
	static BYTE parms[] =
		VTS_I4 VTS_I4 VTS_I4;
	InvokeHelper(0x60030002, DISPATCH_METHOD, VT_BOOL, (void*)&result, parms,
		hPBHWND, iMin, iMax);
	return result;
}

how do I get that number 0x600.....? I think what the call does is it calls a particular function from the VB dll, but I just cant figure how out to get that number. Also I hope this number isnt machine specific (just cant be because its hardcoded...)

Thanks,
ns

Re: InvokeHelper question

Anders Molin23-Sep-02 3:57

Anders Molin

23-Sep-02 3:57

It's the DispID of the VB Object, it won't chang from machine to machine..

- Anders

Money talks, but all mine ever says is "Goodbye!"

Another InvokeHelper question

ns23-Sep-02 5:35

23-Sep-02 5:35

Okay. thanks. I dont know how to get this DispID. Is there a procedure outlined somewhere that you know of? Is is somethin that can be answered in a post without too much trouble ?

Thanks,
ns

Re: Another InvokeHelper question

Anders Molin23-Sep-02 5:45

Anders Molin

23-Sep-02 5:45

That depends... The only way I know is using the #import statement to import the dll. Then, in the .tlb-file generated by VC, you can see some const's called IID_SomeName. That's the ones you want Smile | :)

Hope it helps...

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: Another InvokeHelper question

Lakitu23-Sep-02 7:44

Lakitu

23-Sep-02 7:44

You can use OLE View that comes with VC++ 6.0. You open a typelib, select the appropriate interface (probably an IDispatch-derived one).
Browse through the methods and you'll notice ids.

If a train station is where the train stops, what's a workstation...?

Re: Another InvokeHelper question

ns23-Sep-02 7:58

23-Sep-02 7:58

Wonderful! Thats exactly where I found it (for the sample) after you directed me. APpreciate it!

Then I looked for a tlb in my VB prj folder and there wasnt one! So I have to locate a tlb file for my prj. Wonder if you have to tell VB to make it...
Thanks,
ns

Re: Another InvokeHelper question

Lakitu26-Sep-02 1:36

Lakitu

26-Sep-02 1:36

DLLs usually incorporate the TLB as a resource. OLe View can read those as well. Just load the dll (or exe) instead.

If a train station is where the train stops, what's a workstation...?

How do i know the complated path of a program?

Anonymous23-Sep-02 2:07

Anonymous

23-Sep-02 2:07

I need the complated path to load a library, this library is in the same place that the executable, I see the class CWinApp, but this class doesn´t give me the complated path. Also i have changed the path with m_pszProfilePath but it doesn´t work.

thank in advances.

Re: How do i know the complated path of a program?

Andreas Saurwein23-Sep-02 2:37

Andreas Saurwein

23-Sep-02 2:37

::GetModuleFileName()

...make it about Visual C++, and don't ever mention Visual Basic. Nick Hodapp (MSFT) in Semicolon[^]

Re: How do i know the complated path of a program?

Lakitu23-Sep-02 2:38

Lakitu

23-Sep-02 2:38

Use GetModuleFileName()

If a train station is where the train stops, what's a workstation...?

conversion

Anonymous23-Sep-02 0:51

Anonymous

23-Sep-02 0:51

hi all,

can u tell me how to convert a BSTR to char(i want to display the bstr value)

Re: conversion

Lakitu23-Sep-02 0:55

Lakitu

23-Sep-02 0:55

Use the OLE2T() macro.

Look! They have the Internet on computers now! (Homer J. Simpson)

Re: conversion

jmkhael23-Sep-02 2:09

jmkhael

23-Sep-02 2:09

Or assign it to a CString, or use _bstr_t

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: conversion

Rashid Thadha23-Sep-02 2:40

Rashid Thadha

23-Sep-02 2:40

e.g BSTR bstrValue

_bstr_t bstrTemp(bstrValue);
CString sValue = (LPCTSTR)bstrTemp;

Re: UnregisterClass and atoms

Lakitu23-Sep-02 0:47

Lakitu

23-Sep-02 0:47

Use MAKELONG(hAtom, 0) where hAtom is your ATOM value you got from RegisterClassEx.

Look! They have the Internet on computers now! (Homer J. Simpson)

Re: UnregisterClass and atoms

Lakitu23-Sep-02 1:12

Lakitu

23-Sep-02 1:12

no problem, always happy to help Roll eyes | :rolleyes:

If a train station is where the train stops, what's a workstation...?

Re: UnregisterClass and atoms

Lakitu23-Sep-02 2:37

Lakitu

23-Sep-02 2:37

Just cast it to a LPCTSTR like so: (LPCTSTR)MAKELONG(...)

If a train station is where the train stops, what's a workstation...?

Re: UnregisterClass and atoms

Andreas Saurwein23-Sep-02 2:45

Andreas Saurwein

23-Sep-02 2:45

adrian cooper wrote:
while(beerInFridge()) {

You should make this a member of CKitchen and get a instance, instead of a global function. You might get the beerlevel of some foreign fridge. (besides of a possible beerleak) Laugh | :laugh:

...make it about Visual C++, and don't ever mention Visual Basic. Nick Hodapp (MSFT) in Semicolon[^]

VB call 'C" dll, not C++ dll

DC23-Sep-02 0:32

23-Sep-02 0:32

When I use VB.NET to call a 'C' dll. It displayed error as follow

ERROR
=====
"Object reference not set to an instance of an object."

'C' FILE (Not C++, so hasn't used _stdcall)
===========================================
BOOLEAN WINAPI PacketGetAdapterNames(PTSTR pStr,PULONG BufferSize)

'DEF' FILE
==========
EXPORT
PacketGetAdapterNames

In VB.NET
=========
Private Declare Function PacketGetAdapterNames Lib "packet.dll" (<marshalas(unmanagedtype.lpwstr)> ByVal lpBuf As String, <marshalas(unmanagedtype.u8)> ByVal BufferSize As Long) As Boolean
.
.
lSuccess = PacketGetAdapterNames(Name, Size)
.

It display error.

More investigation
==================
I try to use "LoadLibrary" and "GetProcAddress" to test its existence. It hasn't reported error.

I also write another routine in C++ with same argument, no error.

So, any ideas on how to call this 'C' routine in VB ?

Danny

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