C / C++ / MFC

CoCreateInstance fail for 64 bit

22-Feb-13 23:03

You cannot use GetLastError() in this way, it will only return the last error value in the current thread of your application. And even if you could somehow call it you would not get a valid response. I think you will find that this project is not viable.

john563220-Feb-13 21:46

john5632

20-Feb-13 21:46

CoCreateInstance is getting fail for 64 bit dlls.

code:

C++

HRESULT hr=CoCreateInstance(__uuidof(Prfl::Profiles),NULL,CLSCTX_INPROC_SERVER,
			__uuidof(Prfl::IProfiles),(void**) &MyProfile);

Do I need to change parameter for 64 bit?

Richard MacCutchan20-Feb-13 22:43

20-Feb-13 22:43

What is the actual fail code?

john563220-Feb-13 23:32

john5632

20-Feb-13 23:32

Unknown error 800700C1

Richard MacCutchan20-Feb-13 23:58

20-Feb-13 23:58

Yet another useful error code from Microsoft. It is quite possible that your code is somehow trying to link to a 32 bit DLL; try using Dependency Walker to track all the dependencies. Other than that you should try the Microsoft help sites.

john563221-Feb-13 0:45

john5632

21-Feb-13 0:45

I checked the dlls which I am using is of 64 bit.
Any other possible reason?

Richard MacCutchan21-Feb-13 1:19

21-Feb-13 1:19

john5632 wrote:
Any other possible reason?

I assume yes, but since the error code does not give us any useful detail I suggest you pass it up the line to Microsoft.

Jochen Arndt21-Feb-13 0:53

Jochen Arndt

21-Feb-13 0:53

Please check the return value again. 0x800700C1 seems to be wrong. The high word 0x8007 indicates that it is a normal Windows error code. But 0xC1 / 193 is ERROR_BAD_EXE_FORMAT: '%1 is not a valid Win32 application' which makes no sense here.

image processing toolkits | batch image processing

C^hris L^osinger22-Feb-13 4:14

C^hris L^osinger

22-Feb-13 4:14

it makes sense if the process is 32-bits and is trying to load a 64-bit DLL.

Cursor from Bitmap Conundrum

Ben Aldhouse20-Feb-13 21:36

Ben Aldhouse

20-Feb-13 21:36

Hello. I have a cursor conundrum. I am developing a custom control and one feature I want this custom control to have is the ability to be able to rearrange its appearance by dragging and dropping one part of it to another. The way I decided I would do this would be to:

1) Convert the selected area into a bitmap
2) Use the bitmap from 1) as the cursor until the drop point is selected.
3) Redraw the control in the new arrangement.

I am not worried about step 3). That should be trivial - it won't involve anything I haven't achieved already in my code concerning bitmaps or device contexts. However, I have a conundrum concerning step 2). I have achieved what I want to achieve but only if I save the bitmap to a file first then reload it as a cursor! What I am looking for here is a way of obtaining the bitmap data and converting it directly into a cursor. Clearly my problem stems from having cobbled together samples of code from various sources without properly understanding what is going on -

So I call the image capuring function on clicking the mouse...

C++

void CScrollBarEx::OnLButtonDown(UINT inFlags, CPoint inPoint) {
...
				CaptureAnImage(sliderVector[m_currentSlider-1].sliderRect);
...
}

and then you can see where I have edited out the code where I try and use the HBITMAP used to subsequently make a .bmp file to make the cursor - doing this always produces a black rectangle as the cursor. However- when I save that HBITMAP to .bmp file, then reload it into memory and use that to make a cursor - it works perfectly!

C++

int CScrollBarEx::CaptureAnImage(RECT sliderRect)
{
    //HDC hdcScreen;
    HDC hdcWindow;
    HDC hdcMemDC = NULL;
    HBITMAP hbmScreen = NULL;
    BITMAP bmpScreen;

	HBITMAP m_hAndMask;
	HBITMAP m_hXorMask;


    // Retrieve the handle to a display device context for the client 
    // area of the window. 
    //hdcScreen =  (GetDC())->GetSafeHdc();
    hdcWindow = (GetDC())->GetSafeHdc();

    // Create a compatible DC which is used in a BitBlt from the window DC
    hdcMemDC = CreateCompatibleDC(hdcWindow); 


    if(!hdcMemDC)
    {
       // MessageBox(hWnd, L"CreateCompatibleDC has failed",L"Failed", MB_OK);
        goto done;
    }

    // Get the client area for size calculation
    RECT rcClient;
    GetClientRect(&rcClient);

    
	/*
	//This is the best stretch mode
    SetStretchBltMode(hdcWindow,HALFTONE);

    //The source DC is the entire screen and the destination DC is the current window (HWND)
    if(!StretchBlt(hdcWindow, 
               sliderRect.left ,sliderRect.top, 
               sliderRect.right, sliderRect.bottom, 
               hdcWindow, 
               0,0,
               GetSystemMetrics (SM_CXSCREEN),
               GetSystemMetrics (SM_CYSCREEN),
               SRCCOPY))
    {
        //MessageBox(hWnd, L"StretchBlt has failed",L"Failed", MB_OK);
        goto done;
    }
    */
	

    // Create a compatible bitmap from the Window DC
		//hbmScreen = CreateCompatibleBitmap(hdcWindow, rcClient.right-rcClient.left, rcClient.bottom-rcClient.top);
	
	    //hbmScreen = CreateCompatibleBitmap(hdcWindow, sliderRect.right, sliderRect.bottom-sliderRect.top);
		
	    hbmScreen = CreateCompatibleBitmap(hdcWindow, sliderRect.right-sliderRect.left, sliderRect.bottom-sliderRect.top);

    
    if(!hbmScreen)
    {
        //MessageBox(hWnd, L"CreateCompatibleBitmap Failed",L"Failed", MB_OK);
        goto done;
    }

	// Select the compatible bitmap into the compatible memory DC.
    SelectObject(hdcMemDC,hbmScreen);

    // Bit block transfer into our compatible memory DC.
    if(!BitBlt(hdcMemDC, 
               0,0,
               sliderRect.right-sliderRect.left, sliderRect.bottom-sliderRect.top, 
               hdcWindow, 
               sliderRect.left,sliderRect.top,
               SRCCOPY))
    {
        //MessageBox(hWnd, L"BitBlt has failed", L"Failed", MB_OK);
        goto done;
    }

	
	// Get the BITMAP from the HBITMAP
    GetObject(hbmScreen,sizeof(BITMAP),&bmpScreen);

	
    BITMAPFILEHEADER   bmfHeader;    
    BITMAPINFOHEADER   bi;
     
	
	bi.biSize = sizeof(BITMAPINFOHEADER);    
    bi.biWidth = bmpScreen.bmWidth;    
    bi.biHeight = bmpScreen.bmHeight;  
    bi.biPlanes = 1;    
    bi.biBitCount = 32;    
    bi.biCompression = BI_RGB;    
    bi.biSizeImage = 0;  
    bi.biXPelsPerMeter = 0;    
    bi.biYPelsPerMeter = 0;    
    bi.biClrUsed = 0;    
    bi.biClrImportant = 0;

    DWORD dwBmpSize = ((bmpScreen.bmWidth * bi.biBitCount + 31) / 32) * 4 * bmpScreen.bmHeight;

	// Starting with 32-bit Windows, GlobalAlloc and LocalAlloc are implemented as wrapper functions that 
    // call HeapAlloc using a handle to the process's default heap. Therefore, GlobalAlloc and LocalAlloc 
    // have greater overhead than HeapAlloc.
    HANDLE hDIB = GlobalAlloc(GHND,dwBmpSize); 
    char *lpbitmap = (char *)GlobalLock(hDIB);    
  
	// Gets the "bits" from the bitmap and copies them into a buffer 
    // which is pointed to by lpbitmap.
    GetDIBits(hdcWindow, hbmScreen, 0,
        (UINT)bmpScreen.bmHeight,
        lpbitmap,
        (BITMAPINFO *)&bi, DIB_RGB_COLORS);	

    // A file is created, this is where we will save the screen capture.
    HANDLE hFile = CreateFile(L"capture.bmp",
        GENERIC_WRITE,
        0,
        NULL,
        CREATE_ALWAYS,
        FILE_ATTRIBUTE_NORMAL, NULL);   
    
    // Add the size of the headers to the size of the bitmap to get the total file size
    DWORD dwSizeofDIB = dwBmpSize + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
 
    //Offset to where the actual bitmap bits start.
    bmfHeader.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER); 
    
    //Size of the file
    bmfHeader.bfSize = dwSizeofDIB; 
    
    //bfType must always be BM for Bitmaps
    bmfHeader.bfType = 0x4D42; //BM   
 
    DWORD dwBytesWritten = 0;
    WriteFile(hFile, (LPSTR)&bmfHeader, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL);
    WriteFile(hFile, (LPSTR)&bi, sizeof(BITMAPINFOHEADER), &dwBytesWritten, NULL);
    WriteFile(hFile, (LPSTR)lpbitmap, dwBmpSize, &dwBytesWritten, NULL);
    
    //Unlock and Free the DIB from the heap
    GlobalUnlock(hDIB);    
    GlobalFree(hDIB);


	//Close the handle for the file that was created
    CloseHandle(hFile);
	
	/*
	//20130216
	//Turn the cursor into a bitmap
	//HANDLE hNewBMP = CopyImage(hbmScreen,IMAGE_BITMAP,0,0,LR_COPYRETURNORG);
	m_hXorMask	  =  NULL;
	m_hAndMask	  =  NULL;
	//CColorCursor::GetMaskBitmaps(hbmScreen,RGB(0,0,0),m_hAndMask,m_hXorMask);
	m_hCursor = CColorCursor::CreateCursorFromBitmap(hbmScreen,RGB(0,0,0),0,0);
	//m_hCursor = CColorCursor::CreateCursorFromBitmap(hNewBMP,RGB(0,0,0),0,0);
	*/


	/*
	//Use Jiju George's bitmap drawing function
	HBITMAP aBMP = GetCursorBitmap();
	m_hCursor = CColorCursor::CreateCursorFromBitmap(aBMP,RGB(0,0,0),0,0);
	*/

	//Load up the file that was created earlier in the function into a bitmap
	//   then use that as the cursor.
	HBITMAP   hBMP; 
	HPALETTE palette;
	LoadBitmapFromBMPFile(L"capture.bmp", &hBMP, &palette);
	m_hCursor = CColorCursor::CreateCursorFromBitmap(hBMP,RGB(0,0,0),0,0);
	
	::SetCursor(m_hCursor); 
    
    //Clean up
done:
    DeleteObject(hbmScreen);
    DeleteObject(hdcMemDC);
    //ReleaseDC(hdcScreen);
    //ReleaseDC(hdcWindow);
    //DeleteObject(hdcScreen);
    DeleteObject(hdcWindow);


    return 0;
}

and

C++

//////////////////////////////////////////////////////////////////////
//  CreateCursorFromBitmap 
//  Function to create a cursor from HBITMAP. 
//  Pass bitmaps having standard cursor sizes like 16*16, 32*32...
//////////////////////////////////////////////////////////////////////
HCURSOR CColorCursor::CreateCursorFromBitmap(HBITMAP hSourceBitmap,
											 COLORREF clrTransparent,
											 DWORD   xHotspot,DWORD   yHotspot)
{
	HCURSOR hRetCursor = NULL;

	do
	{
		if(NULL == hSourceBitmap)
		{
			break;
		}

		//Create the AND and XOR masks for the bitmap
		HBITMAP hAndMask = NULL;
		HBITMAP hXorMask = NULL;
		GetMaskBitmaps(hSourceBitmap,clrTransparent,hAndMask,hXorMask);
		if(NULL == hAndMask || NULL == hXorMask)
		{
			break;
		}

		//Create the cursor using the masks and the hotspot values provided
		ICONINFO iconinfo = {0};
		iconinfo.fIcon		= FALSE;
		iconinfo.xHotspot	= xHotspot;
		iconinfo.yHotspot	= yHotspot;
		iconinfo.hbmMask	= hAndMask;
		iconinfo.hbmColor	= hXorMask;

		hRetCursor = ::CreateIconIndirect(&iconinfo);

	}
	while(0);

	return hRetCursor;
}

I have used code from the following sources...

HOWTO: How To Use LoadImage() to Read a BMP File
at http://support.microsoft.com/kb/158898

and

Creating a color cursor from a bitmap
at Creating a color cursor from a bitmap

In the last article the author warns against making a cursor outside of the standard cursor sizes but this doesn't explain why the code works when loading a cursor from file but not when using the bitmap directly!

modified 21-Feb-13 4:05am.

How Print multiple copies with printdlg in MFC

haha_c20-Feb-13 21:06

haha_c

20-Feb-13 21:06

How Print multiple copies with printdlg in MFC

Richard MacCutchan20-Feb-13 21:13

20-Feb-13 21:13

See here[^].

haha_c20-Feb-13 21:54

haha_c

20-Feb-13 21:54

I create printdlg :CPrintDialog(FALSE, PD_ALLPAGES | PD_COLLATE | PD_NOSELECTION | PD_HIDEPRINTTOFILE);

when I input copies>1,It still print one.
DEVMODE *dm= (LPDEVMODE)::GlobalLock(pInfo->m_pPD->m_pd.hDevMode);

the dm->dmCopies = 1;

Richard MacCutchan20-Feb-13 22:39

20-Feb-13 22:39

Try using CPrintDialog::GetDevMode[^] to get the pointer to the DEVMODE structure.

Load an image dynamically in win32 using VC++

haha_c20-Feb-13 23:31

haha_c

20-Feb-13 23:31

It's also no use

Sachin k Rajput 20-Feb-13 20:05

Sachin k Rajput

20-Feb-13 20:05

I'm creating an application in which I'll have to load an image using open file dialog.
there may be any image from system and will have to display that. I'll not have to save my image in resource because its not defined which image is going to be displayed.
Application is win32 API not MFC.
How can I do it?
Thanks!

_AnsHUMAN_ 20-Feb-13 20:56

_AnsHUMAN_

20-Feb-13 20:56

This should help[^]

You talk about Being HUMAN. I have it in my name
AnsHUMAN

Richard MacCutchan20-Feb-13 22:32

20-Feb-13 22:32

You can use the GDI+ Graphics.DrawImage methods[^] to draw most image types.

Sachin k Rajput 21-Feb-13 0:27

Sachin k Rajput

21-Feb-13 0:27

It's completed.
Now I'm trying to load image from memory buffer.
Are you having any idea?

Richard MacCutchan21-Feb-13 1:14

21-Feb-13 1:14

You can copy the buffer to a global memory buffer, then use CreateStreamOnHGlobal[^] to get the image buffer as a stream, which can then be passed to Image.FromStream[^]. The following should (I hope) help to clarify it:

C++

// allocate a global memory block and copy the image data to it
// dwFileSize is size of image buffer in memory (or file size if reading directly)
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, dwFileSize);
PVOID pvData = GlobalLock(hGlobal);
CopyMemory(pvData, pImageData, dwFileSize);  // pImageData is source memory buffer
GlobalUnlock(hGlobal);

IStream* pStream;
// create IStream* from global memory which will
// be freed automatically when the stream is released
HRESULT hResult = CreateStreamOnHGlobal(hGlobal, TRUE, &pStream);
Image* pImage = Image::FromStream(pStream);
pStream->Release();

RectF destRect; // set values to destination location and size
Graphics graphics(hDC);
graphics.DrawImage(pImage, destRect);
delete pImage;

Why does so many companies use directUI to show GUI ?

Shaheed Legion26-Feb-13 5:10

Shaheed Legion

26-Feb-13 5:10

Hi Toms, you could use the CxImage library - which allows you to specify the image bits when constructing an image, or you could use CreateDIBSection to create a bitmap using the image data you already have, then display it using an HDC.

For awesome websites or just to chat check out my blog for more info. . .

yu-jian20-Feb-13 15:09

yu-jian

20-Feb-13 15:09

Although MFC only supply very little controls, it will need too much time to make its own directUI controls.

I donot know if anyother advantage if using directUI.

CFileDialog in Dll Project

LeeUnSong20-Feb-13 14:38

LeeUnSong

20-Feb-13 14:38

When I used CFileDialog in MFC Dialog Project, it ran correctly. But when CFileDialog is used in DLL Projects(MFC Dll and Win32 Dll) it didn't run.
In detail, DoModal() function didn't run. program stopped.
Please Help me.
Thank you for reading my question.

Re: CFileDialog in Dll Project

Richard MacCutchan20-Feb-13 21:10