Creating 16 color bitmap from DC - C / C++ / MFC Discussion Boards

Re: How to calculate the Bandwidth of our computer

Anshul Mehra2-Nov-04 3:20

2-Nov-04 3:20

Can u plz tell me fn() which retrives packets sent and received information which is displayed in the Local Area Connection Setup (which is in the task bar in the right hand side corner).

Thnx in Advance

Comboy2080

Re: How to calculate the Bandwidth of our computer

Antony M Kancidrowski2-Nov-04 4:04

Antony M Kancidrowski

2-Nov-04 4:04

If you want to analyse packets to and from your PC take a look at WinPCap[^]

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)

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?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.