Find the static link solution of dll, or bmp to jpg source code

5954979

There is a dll that converts bmp to jpg, no .h, no .lib, but it was successfully called by me, the code is attached at the back.
  There is no problem in calling it in ordinary programs, but I call it in ActiveX, and I run into a path problem. My ActiveX finally needs to be packaged into a cab with this dll and released after digital signature.
  My test found (not using cab, but two separate), ActiveX to find the dll on the desktop when using it on the Web, I guess it may be the path of IE shortcut. In this way, you cannot find the dll after packaging, because ActiveX and dll will be downloaded under the path C:\WINDOWS\Downloaded Program Files.
  I think there should be no path problem with static linking, but there is no .h and even .lib. Can static linking be achieved?
  Of course, there are other dlls or class source code that can provide bmp to jpg. You can use VC ++ 6, not C and VC ++. Net.


Attachment: dynamic link code
typedef bool (__ stdcall CHANGE) (char *, char *);
void CJpeg :: BmpToJpeg (CString Bmp, CString Jpeg)
{
HINSTANCE hInst;
CHANGE * pFunc;
hInst = :: LoadLibrary ("jpgdll.dll");
pFunc = (CHANGE *) :: GetProcAddress (hInst, "BmpToJpg");
pFunc (Bmp.GetBuffer (Bmp.GetLength ()), Jpeg.GetBuffer (Jpeg.GetLength ()));
Bmp.ReleaseBuffer ();
Jpeg.ReleaseBuffer ();
:: FreeLibrary (hInst);
}

2511718

The static link must have a lib file. You can use the CImage :: Save function to convert it.

2511718

CBitmap bmp;
bmp.LoadBitmap (IDB_BITMAP1);

CImage image;
image.Attach (bmp);

image.Save ("c:\\aa", ImageFormatJPEG);

food0012

You are writing a DLL, it is not enough to dynamically load this DLL, bridge it

5954979

2511718:
Halo, it's that simple? Where is CImage in the class? How can I not find it in msdn?

food0012:
Isn't there a path problem when bridging my dll to call that dll? I use it on the Web.

lixiaof6471

Find a JpegLib.

2511718

#include <atlimage.h>

CImage is a class in the atl library

2511718

Maybe your computer does not have the atl library installed, which is usually installed by default in VC.

5954979

Let me take a look, then no other support is needed at the time of release?

5954979

Haha, it's installed but can't find it