Re: How can I change a menu item when I click? [Modified] - C / C++ / MFC Discussion Boards

Re: How to calculate the Bandwidth of our computer

Selvam R2-Nov-04 2:56

Selvam R

2-Nov-04 2:56

Hi,

the Win32 API fn() ??? No function avilable..

Re: How to calculate the Bandwidth of our computer

ThatsAlok3-Nov-04 17:57

ThatsAlok

3-Nov-04 17:57

comboy2080 wrote:
Can some one tell me the Win32 API fn() or fn()'s used to calculate the bandwidth consumption of our computer. I am on NT platform and using VC++6.0 compiler.

yeah there are some Good IPhelper Api's presents in the VC++ enviornment

Look in Index of MSDN for iphlpapi Module

or Here is the required Function that will help you
-->GetIfTable

or you can look for firewall Implementation by SUdhir MAngla at Cp.search for article by author for Sudhir Mangla

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

What is the defference about _T("abc") and "abc"?

freehawk1-Nov-04 23:41

freehawk

1-Nov-04 23:41

Hello everyone

What is the defference about _T("abc") and "abc"? Thank you.

-Freehawk

Re: What is the defference about _T("abc") and "abc"?

Pharago1-Nov-04 23:57

Pharago

1-Nov-04 23:57

_T("abc") translate "abc" to unicode on unicode builds and remain "abc" on non unicode builds, see tchar.h

hope that helps, regards

Re: What is the defference about _T("abc") and "abc"?

RChin2-Nov-04 0:13

RChin

2-Nov-04 0:13

As well as the above reply, you can also read this[^] article for a more detailed explanation (and other vital info on strings).

I Dream of Absolute Zero

Creating 16 color bitmap from DC

Vinaya1-Nov-04 23:03

Vinaya

1-Nov-04 23:03

Hi,

I need to modify a 16 color bmp and then save it as a seperate file. I loaded a 16 color 48x48 bmp file on DC using the LoadImage() and BitBlt() API. Using GDI functions, I change the display on the DC, say draw a line on the DC, on top of the image displayed. Now I need to capture the current DC ( bmp image + the changes,i.e., the line) and create a new BMP file.

For 256 color and 16 color BMP file, the new BMP created is a plain white imgage, if I load the image with 'LR_CREATEDIBSECTION' flag in LoadImage API. else I get am able to create the file, but the image size is different. For the 24 bpp the application is working fine. Where am i doing wrong. I am using the 'CreateCompatibleBitmap()' to create the bitmap from DC. Is there any other way?.

<br />
	HBITMAP hBMP;<br />
	RECT r;<br />
	GetClientRect(GetDlgItem(hWnd,IDC_STATIC_1),&r);<br />
	HDC memDC = CreateCompatibleDC ( pDC );<br />
	hBMP = (HBITMAP)LoadImage(hResDll ,filename,IMAGE_BITMAP,  0, 0, LR_LOADFROMFILE);<br />
	SelectObject ( memDC, hBMP );<br />
	BitBlt(pDC,r.left ,r.top ,imgWidth,imgHeight ,memDC,0,0,SRCCOPY);<br />
	DeleteObject(hBMP);

..............................
To capture the modified BMP from DC
.............................

  <br />
        RECT rc;<br />
	GetClientRect(GetDlgItem(hWndDlg,IDC_STATIC_1),&rc);<br />
	HDC hScreenDC = GetWindowDC(GetDlgItem(hWndDlg,IDC_STATIC_1)); <br />
	HDC hmemDC = CreateCompatibleDC(hScreenDC);   <br />
	int ScreenWidth = rc.right;<br />
	int ScreenHeight = rc.bottom;<br />
	HBITMAP hmemBM = CreateCompatibleBitmap(hScreenDC, ScreenWidth ,ScreenHeight );<br />
	SelectObject(hmemDC, hmemBM);<br />
	bufLen= filesize;<br />
	HGLOBAL hpxldata = GlobalAlloc(GMEM_FIXED ,imgWidth * imgHeight * 3 ); <br />
	void * lpvpxldata = GlobalLock(hpxldata);<br />
<br />
	// fill .bmp - structures<br />
	BITMAPINFO bmInfo;<br />
	bmInfo.bmiHeader.biSize = 40;<br />
	bmInfo.bmiHeader.biWidth = imgWidth;<br />
	bmInfo.bmiHeader.biHeight = imgHeight;<br />
	bmInfo.bmiHeader.biPlanes = 1;<br />
	bmInfo.bmiHeader.biBitCount = 24;<br />
	bmInfo.bmiHeader.biCompression = 0;<br />
	bmInfo.bmiHeader.biSizeImage = 0;<br />
	bmInfo.bmiHeader.biXPelsPerMeter = 0;<br />
	bmInfo.bmiHeader.biYPelsPerMeter = 0;<br />
	bmInfo.bmiHeader.biClrUsed = 0;<br />
	bmInfo.bmiHeader.biClrImportant = 0;<br />
	BITMAPFILEHEADER bmFileHeader;<br />
	bmFileHeader.bfType = 19778;<br />
	bmFileHeader.bfSize = filesize; <br />
	bmFileHeader.bfReserved1 = 0;<br />
	bmFileHeader.bfReserved2 = 0;<br />
	bmFileHeader.bfOffBits = 54;<br />
	// copy bitmap data into global memory<br />
	StretchBlt(hmemDC,0 ,0 ,imgWidth ,imgHeight,hScreenDC,0,0,ScreenWidth,ScreenHeight ,SRCCOPY);<br />
	int nret = GetDIBits(hmemDC, hmemBM, 0, imgHeight, lpvpxldata, &bmInfo, DIB_RGB_COLORS);<br />
	<br />
	<br />
	ImgBuffer = (void*)malloc(bufLen); <br />
	memset(ImgBuffer, 0, bufLen); <br />
	memcpy((char*)ImgBuffer, (char*)&bmFileHeader,14);<br />
	memcpy((char*)ImgBuffer + 14, (char*)&bmInfo, 40);<br />
	memcpy((char*)ImgBuffer+54, (char*)lpvpxldata,bufLen - 54); <br />
	FILE *fn = fopen("e:\\vinaya\\testimg.bmp","w");	<br />
	fn = fopen("e:\\NewImg.bmp","w");<br />
	fwrite((char*) ImgBuffer ,sizeof(char), filesize, fn);<br />
	fclose(fn);<br />
	fn = NULL;<br />
	<br />
	// clean up<br />
	int i = GlobalUnlock(hpxldata);<br />
	DWORD size = GlobalSize(hpxldata);<br />
	HGLOBAL h = GlobalFree(hpxldata);<br />
	DeleteObject(hmemBM);<br />
	DeleteDC(hmemDC);<br />
	ReleaseDC(0,hScreenDC);<br />
	return ;

The new image need to be same in file size, resolution, bpp except the modification in image data. Kindly help.

Thanks

~Vini

How can I change a menu item when I click?

lillah1-Nov-04 22:58

lillah

1-Nov-04 22:58

I want to change a menu item, if i click over "Pause" it must appear "Run", for example.
But how can i do this?

Thanks.

Re: How can I change a menu item when I click? [Modified]

Antony M Kancidrowski2-Nov-04 1:32

Antony M Kancidrowski

2-Nov-04 1:32

Assuming you are using MFC. Add a handler for the OnUpdate of the menu item. You will also need a state flag of some kind (say a bool m_bIsRunning)

So you will have something like

void CMyDoc::OnUpdateMenuItem(CCmdUI* pCmdUI)
{
:
  if (m_bIsRunning)
    pCmdUI->SetText(_T("Pause"));
  else
    pCmdUI->SetText(_T("Run"));
:
}

NOTE: You need to toggle m_bRunning when you select the menu item.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

activeX

hou_1261-Nov-04 22:48

hou_126

1-Nov-04 22:48

an activeX control acess the oracle by ODBC interface,such as a windows application.coun't it realize? if can ,tell me how to do,Thanks a lot !!

System tray colors

Anonymous1-Nov-04 21:52

Anonymous

1-Nov-04 21:52

How can

Re: System tray colors

RChin1-Nov-04 22:19

RChin

1-Nov-04 22:19

How can, to you too.

I Dream of Absolute Zero

Re: System tray colors

Selvam R2-Nov-04 2:40

Selvam R

2-Nov-04 2:40

Hi,,,

Re: System tray colors

ThatsAlok3-Nov-04 17:59

ThatsAlok

3-Nov-04 17:59

what do u want buddy

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

How to define an array of the object in class

Cramp1-Nov-04 21:48

Cramp

1-Nov-04 21:48

First. I appreciate that you spend your time to read my question.

I have question about how to define an object array at private area.

For example: I have a class which is call base_class; I want to create a new class which is called

new_class; But I want to define base_class[50] in my new class. Could someone help me?

The following code is what I define in my new class;

class new_class
{
public:
// define some public function here.
private:
base_class datause[50];
};

I got wrong message when I create new_class object in my main program.

Re: How to define an array of the object in class

Cedric Moonen1-Nov-04 21:55

Cedric Moonen

1-Nov-04 21:55

What error message did you get ?
Can you be a little bit more precise...

Re: How to define an array of the object in class

Maximilien2-Nov-04 2:42

Maximilien

2-Nov-04 2:42

did you #include the declaration of base_class before declaring new_class

Maximilien Lincourt
Your Head A Splode - Strong Bad

Thumbnail view and Drag and Drop

phieu1-Nov-04 21:36

phieu

1-Nov-04 21:36

Hi all,

Now I have image items in thumbnail view in CListCtrl(it looks like Explorer), and I want to implement drag and drop image items in the control. Could you tell me the way?

Thank you!
phucfbk@yahoo.com

Re: Thumbnail view and Drag and Drop

Selvam R2-Nov-04 2:45

Selvam R

2-Nov-04 2:45

Hi,

Find This,

http://www.codeproject.com/listctrl/dragtest.asp[^]

Enable Combo

balajeedurai1-Nov-04 21:17

balajeedurai

1-Nov-04 21:17

Hai Frens

My application is a form based application and has an combo box disabled at the initial state. . .I need to enable that combo on clicking a menu item.
Can any one suggest me how to do that ?

I need another suggestion for selecting multiple rows in flexgrid by pressing Ctrl key.

Thanx

SDI Main Frame positioning?

kriaz1-Nov-04 19:21

kriaz

1-Nov-04 19:21

I want my SDI application to have always the same size and position on screen.
Resizing and Moving is disabled by the code below; which is inserted in OnCreate of main frame

CMenu* pTopMenu = GetSystemMenu(FALSE);
if(pTopMenu != NULL)
{
pTopMenu -> RemoveMenu(SC_SIZE, MF_BYCOMMAND); //No ReSize
pTopMenu -> RemoveMenu(SC_MOVE, MF_BYCOMMAND); //No Move
}

for Resize and move above code works fine!

BUT for size let us look at PreCreatewindow of Mainframe

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
if( !CFrameWnd::PreCreateWindow(cs) )
return FALSE;
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs

cs.style &= ~FWS_ADDTOTITLE;

cs.x = 0;
cs.y = 77;

cs.cx = 1000;
cs.cy = 500;

return TRUE;
}

the above code didn't work; if i change one value in the structure the other is automatically changed/ignored, gives unexpected positioning. May be some sort of aspect ratio problem which windows might be maintaining internally.

Another soloution is to use Move in the initinstance but i want to avoid it since it first shows main frame at the 0,0 position and then moves it to required postion, with a slight but observable delay.

Please help to solve the above problem.

How to retrieve public folders list in an exchange server

lavanm1-Nov-04 18:45

lavanm

1-Nov-04 18:45

How to retrieve the list of public folders in an exchange server using ADSI programming(vc++).Please give the code.

How to create Web Interface using MFC Program

pubududilena1-Nov-04 18:16

pubududilena

1-Nov-04 18:16

hi all,
I have created a DialogBase Application using MFC ,Visual C++..
Now I want to create Web Interface to my Application..How am I going to do that ?..
If any one know that please reply me..
Thanks in advance..

Re: How to create Web Interface using MFC Program

alex.barylski1-Nov-04 20:00

alex.barylski

1-Nov-04 20:00

If it's a dialog application just use the ActiveX web browser control.

How do I print my voice mail?

Re: How to create Web Interface using MFC Program

Michael P Butler1-Nov-04 23:54

Michael P Butler

1-Nov-04 23:54

Your question is a little confused.

Are you wanting to create a web interface that runs on a web-server and users access via a browser? Or do you want to emulate the web-look and feel like Microsoft Money attempts to.

If you want to run your app off a web-server, then you'll need to look into one of the web technologies such as ASP.NET or PHP or ASP.

Michael

CP Blog [^]

GDIPlus cast *Image to Bitmap

Nicholas Cardi1-Nov-04 17:12

Nicholas Cardi

1-Nov-04 17:12

Does anyone know if it is possible to cast a GDIPlus *Image to a GDIPlus Bitmap? I can't seem to figure this one out.

Forever Developing

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