C / C++ / MFC

9-Aug-05 8:14

Folks, I am looking for a simple way to load two bitmaps in C++ .NET All I need to do is load them, and know they are there. I have a .DLL that will then run comparison test. My expertise in this is only starting to develop, so advice is appreciated.

Sincerely,

Max Pastchenko

David Crow9-Aug-05 8:25

9-Aug-05 8:25

Is LoadBitmap() what you are looking for?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

mpastchenko9-Aug-05 11:53

9-Aug-05 11:53

You are probably, right, I am gona work on trying to figure out how to implement it. An example you would useful.

Sincerely,

Max Pastchenko

David Crow10-Aug-05 2:44

10-Aug-05 2:44

mpastchenko wrote:
An example you would useful.

See here.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Jose Lamas Rios9-Aug-05 9:36

Jose Lamas Rios

9-Aug-05 9:36

If you need to load them from files, this CDibData article by John R. Shaw[^] might be of help.

--
jlr
http://jlamas.blogspot.com/[^]

mpastchenko9-Aug-05 12:09

9-Aug-05 12:09

Yes, this appers useful. I will look at this example in details later today.

Sincerely,

Max Pastchenko

PJ Arends9-Aug-05 12:06

PJ Arends

9-Aug-05 12:06

LoadImage does this, just use the LR_LOADFROMFILE flag.

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mpastchenko9-Aug-05 13:04

9-Aug-05 13:04

What does this flag indicate?

Sincerely,

Max Pastchenko

Christian Graus9-Aug-05 13:45

Christian Graus

9-Aug-05 13:45

That you're loading an image from a file. You can use it to load from resources as well, from memory.

Christian Graus - Microsoft MVP - C++

non-admin logins prevent program execution

PJ Arends9-Aug-05 15:25

PJ Arends

9-Aug-05 15:25

Read all about LoadImage in MSDN[^]

elephantstar9-Aug-05 7:40

elephantstar

9-Aug-05 7:40

I am trying to launch a program executable(Program A) from another program's menu (Program B). I coded the program B such that it searches the registry for the installation path of program B's executable. This works fine under an administrator login but not for non-admins. I thought it was because I did not grant proper security access by adding KEY_READ to the following line of code:

bRetVal = regKey.Open(HKEY_LOCAL_MACHINE ,(LPCTSTR)strTmp, KEY_READ);

But when I do include KEY_READ, under an admin login, the above code fails. Why is that? For non-admins, it fails either way. The entire code is shown below. Thanks!

CProgramB::Notify(DataNotificationType notifyType, VARIANT data)
{

STARTUPINFO stStartUpInfo;
PROCESS_INFORMATION pProcessInfo;

memset(&stStartUpInfo, 0, sizeof(STARTUPINFO));

stStartUpInfo.cb = sizeof(STARTUPINFO);
stStartUpInfo.dwFlags = STARTF_USESHOWWINDOW;
stStartUpInfo.wShowWindow = SW_SHOWDEFAULT;

CRegKey regKey;
BOOL bRetVal;
CString strTmp = "Software\\ProgramA";

if (bRetVal==ERROR_SUCCESS)
{
CString key = "InstallDir";
char getValue[256] ;
DWORD d = 255;
bRetVal=regKey.QueryValue( getValue , (LPCTSTR)key , &d);
if (bRetVal==ERROR_SUCCESS)
{
char comLine[300];
CString keyValue = (CString)getValue;
strcpy(comLine, keyValue);
strcat(comLine, "programA.exe");
CreateProcess(NULL, comLine, NULL, NULL, FALSE,
NORMAL_PRIORITY_CLASS, NULL, NULL, &stStartUpInfo,
&pProcessInfo);
}
else
AfxMessageBox("Query Failed");
}
else
{
AfxMessageBox( "Program Fail to open.");
}
regKey.Close();
return S_OK;
}

Re: non-admin logins prevent program execution

David Crow9-Aug-05 7:58

Please enter the path for vc60.pdb??

9-Aug-05 7:58

elephantstar wrote:
bRetVal = regKey.Open(HKEY_LOCAL_MACHINE ,(LPCTSTR)strTmp, KEY_READ);

Does this mean that the default security access of KEY_ALL_ACCESS works?

elephantstar wrote:
BOOL bRetVal;
...
if (bRetVal==ERROR_SUCCESS)

At this point, bRetVal has not been assigned a value.

elephantstar wrote:
bRetVal=regKey.QueryValue( getValue , (LPCTSTR)key , &d);

You can't call QueryValue() without having first called Open().

elephantstar wrote:
CString keyValue = (CString)getValue;

Why the unnecessary cast?

Use of the <pre> tag will make your code much easier to read.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

valerie999-Aug-05 7:33

valerie99

9-Aug-05 7:33

when I click on the debug menu, it brings up a find symbols window and asks me to enter the path for vc60.pdb. I don't know what I should do.

Thanks,

David Crow9-Aug-05 7:44

9-Aug-05 7:44

valerie99 wrote:
I don't know what I should do.

How about entering the path to the vc60.pdb file? Most likely this is in the project's Debug folder.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

valerie999-Aug-05 7:57

valerie99

9-Aug-05 7:57

Thanks for the quick reply. I entered the one in the project's debug folder, it says "a file with correct name was found in this directory, but it is not the currect one"

I was running this application last week, it never happened like this, not sure what's going on......

thanks again!

David Crow9-Aug-05 8:00

9-Aug-05 8:00

I would suggest rebuilding the entire project. This will generate a new .pdb file.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Problem with bitmaps in XP

valerie999-Aug-05 8:11

valerie99

9-Aug-05 8:11

thank you so much!!! it works.

djr_apd9-Aug-05 6:17

djr_apd

9-Aug-05 6:17

This code to create bitmaps for the two states of a button works well under Windows 2000 but under Windows XP I get blank light brown buttons. Could anyone please help me with this problem. (Compiled under VC++ 6.0)

void CMyButton::SetText(CString str)
{
int x=0;
int y=0;

BITMAPINFOHEADER bi;
BITMAPINFOHEADER* lpbi;
HBITMAP hBitmap;
HDC hDC, hMemDC;
HANDLE hDIB;
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = 75;
bi.biHeight = 20;
bi.biPlanes = 1;
bi.biBitCount = 24;
bi.biCompression = BI_RGB;
bi.biSizeImage = 75*20*3;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
hDC = ::GetDC(m_hWnd);
hBitmap = CreateDIBitmap(hDC, &bi, 0L, NULL, NULL, 0);
hDIB = GlobalAlloc(GHND, sizeof(BITMAPINFOHEADER)+
16 * sizeof(RGBQUAD));
lpbi = (BITMAPINFOHEADER*)GlobalLock(hDIB);
*lpbi = bi;
GetDIBits(hDC, hBitmap, 0, 19, NULL, (LPBITMAPINFO)lpbi,
DIB_RGB_COLORS);
GlobalUnlock(hDIB);

hMemDC = CreateCompatibleDC(hDC);
SelectObject(hMemDC, hBitmap);
CBrush brush1,brush2;
brush1.CreateSolidBrush(RGB(200,200,200));
brush2.CreateSolidBrush(RGB(0,0,255));
SelectObject(hMemDC, (HBRUSH)brush1);

Rectangle(hMemDC,0,0,100,20);
SetBkColor(hMemDC,RGB(200,200,200));
SetTextColor(hMemDC,RGB(0,0,0));

CFont font;
font.CreatePointFont(97,"arial bold");
SelectObject(hMemDC, (HFONT)font);

int n=str.GetLength();
if(n>=12) x=2;
else if(n==9) x=4;
else x=(14-n)*2;

y=2;

TextOut(hMemDC, x, y,str.GetBuffer(0),str.GetLength());
int w= 75*3;
char bits1[20*75*3];
char bits2[20*75*3];

GetDIBits(hDC, hBitmap, 0, 19, bits1, (LPBITMAPINFO)lpbi,
DIB_RGB_COLORS);
for(int i=1;i<20;i++)
{
memcpy(&bits2[i*w-56],&bits1[(19-i)*w],w);
}
m_bmp1.SetBitmapBits(20*74*3,&bits2[0]);

SelectObject(hMemDC, (HBRUSH)brush2);
Rectangle(hMemDC,0,0,100,20);
SetBkColor(hMemDC,RGB(0,0,255));
SetTextColor(hMemDC,RGB(0,0,0));
TextOut(hMemDC, x, y,str.GetBuffer(0),str.GetLength());
GetDIBits(hDC, hBitmap, 0, 19, bits1, (LPBITMAPINFO)lpbi,
DIB_RGB_COLORS);
for(i=1;i<20;i++)
{
memcpy(&bits2[i*w-56],&bits1[(19-i)*w],w);
}
m_bmp2.SetBitmapBits(20*74*3,&bits2[0]);

font.DeleteObject();
brush1.DeleteObject();
brush2.DeleteObject();
DeleteDC(hMemDC);
GlobalFree(hDIB);
::ReleaseDC(m_hWnd, hDC);

}

Thanks for you help Smile | :)

CButton disable/focus conundrum

23_4449-Aug-05 6:09

23_444

9-Aug-05 6:09

I have two buttons on a form "Save" and "New". "New" is disabled. "Save" is enabled. When I click or press "Save" I want to enable "New", set the focus to it and then disable "Save"

OnSave(){
m_Save.EnableWindow(FALSE);
m_New.EnableWindow(TRUE);
m_New.SetFocus();
}

The problem is (tell me if I'm wrong) that the focus is still with the "Save" button until the function is over. So I get the focus rectangle to the "New" button but it doesn't function like it has the focus i.e. it is inoperable unless clicked (doesn't respond to a "enter key press"

So I then did the CCmdUI update processing (responds to flag) that would detect the proper flag and set the buttons state accordingly. It does do that but the focus is still trapped. The idle status processing must occur after the focus is set on the disabled button.

OnSave()
{
ModeStatus=PRISTINE;
//CmdUI will then set the state of the buttons accordingly

m_New.SetFocus();
}

I want to get the focus to the "New button so user doesn't have to take their hands off the keyboard to activate (i.e. the focus is on the proper button and they press the "enter" key).

Seems like I'm missing something simple. Any help would be appreciated.

Ravi Bhavnani9-Aug-05 6:54

Ravi Bhavnani

9-Aug-05 6:54

Try hiding and (re)showing m_Save. (This is a guess Frown | :(

.

/ravi

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Blake Miller9-Aug-05 7:29

Blake Miller

9-Aug-05 7:29

Typically, I enable and set focus to the OTHER window before disabling the 'current' window, and that has worked for me.
In your case, try this, it might work fine (just rearrange the order):

OnSave(){<br />
m_New.EnableWindow(TRUE);<br />
// after window is already enabled<br />
m_New.SetFocus();<br />
// after focus has been reset<br />
m_Save.EnableWindow(FALSE);<br />
}

23_4449-Aug-05 7:33

23_444

9-Aug-05 7:33

Thanks for the replies.

I thought the same thing too Blake. But it doesn't work. I'm guessing it is because the focus shifts back to the disabled window because the function is completing in the disabled window.

I would have bet the CmdUI was the ticket but apparently not.

David Crow9-Aug-05 8:15

9-Aug-05 8:15

This is a default button issue rather than a focus issue. You need to call SetDefID() at the end of OnSave() to make the New button the default.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb