Debugger: Unhandled Exception: User Breakpoint

I had a problem with my program crashing, so I went to debug it. Now, I've let this project sit around for a while, so I don't remember how long it's been since I used the debugger with it. In any case, now when I try to debug it, all I get is an error:

Unhandled exception at 0x798661d0 in Crypto Tool.exe: User breakpoint.

I did a search on this error and it sounds like it means I'm corrupting the heap somehow, but hardly any code even runs before it. Here's everything that runs:

Code:

//main.cpp
int WINAPI WinMain ( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
{
  g_hinst = hInstance;
if(!MainWin.Init(hInstance, WinProc))
  return 0;
return MainWin.Run();

}

//in base.cpp
bool Winbase::Init(HINSTANCE hinst, WNDPROC WinProc)
{
 
 m_hinst = hinst;
 INITCOMMONCONTROLSEX icc;
 icc.dwSize = sizeof(INITCOMMONCONTROLSEX);
 icc.dwICC = ICC_BAR_CLASSES;
 InitCommonControlsEx(&icc);

 //load rich edit library
 if(!LoadLibrary("riched20.dll"))
 {
  MessageBox(NULL,"Could not load riched20.dll!","Error!",MB_OK|MB_ICONEXCLAMATION);
  return false;
 }
 
 //Load up DLL files
 LoadDLLs();

//...the rest never runs

}

void Winbase::LoadDLLs()
{
  if(!dllLoad.AddDLL("DLL\\Blowfish.dll"))
    MessageBox(NULL,"Blowfish.dll","Failure to load module:",MB_OK);

}

//In DllLoad.cpp
bool Loader::AddDLL(LPCTSTR filename)
{
  HMODULE hDLL = LoadLibrary(filename);//when I hit this line, my error occurs
  if (!hDLL)
    return 0;

  DLLInfo di(hDLL);
  
  if(di.fail()) //error initializing
    return 0;
  
  DLL.push_back(di); //add info for this DLL
  DLLCount++;

  return 1;
}

I've looked it over several times and I just don't see any mistakes. Of course, usually when I post questions like these it turns out to be something silly, so hopefully that's the case

It seems like there was a problem with my DLL. I created it without an entry point, but didn't specify /NOENTRY in the linker options. When I specified /NOENTRY I got a linker error:

LNK2019: unresolved external symbol _main referenced in function _mainCRTStartup

So I did a google search and found out that a solution to that problem was to add __DllMainCRTStartup@12 to Force Symbol References (/INCLUDE:"__DllMainCRTStartup@12") Don't really understand that but it works