C / C++ / MFC

Stephen Hewitt wrote:

To wrap a HDC in a CDC use the CDC::Attach method. If the HDC is already wrapped by a CDC use the CDC::FromHandle method,

//////////////////////////////////////////////////////////////////////
// In the DLL

class __declspec(dllexport) CPSTDriverInterface
{
public:
static short GetCnlVarsCount();
static int *GetAllCnlVar(short var_rank);
static int *GetAllCnlVar(char *szProtVarName);
};
short CPSTDriverInterface::GetCnlVarsCount()
{
    return 3;
}
int *CPSTDriverInterface::GetAllCnlVar(short var_rank)
{
    return 0;
}
int *CPSTDriverInterface::GetAllCnlVar(char *szProtVarName)
{
    return 0;
}


//////////////////////////////////////////////////////////////////////
// In the EXE

class __declspec(dllimport) CPSTDriverInterface
{
public:
static short GetCnlVarsCount();
static int *GetAllCnlVar(short var_rank);
static int *GetAllCnlVar(char *szProtVarName);
};

int _tmain()
{
    short NumOfVars = CPSTDriverInterface::GetCnlVarsCount();
    return 0;
}

Mark Salsbery
Microsoft MVP - Visual C++

static BOOL CALLBACK PrintDialog( HWND hDlg , UINT message , WPARAM wParam , LPARAM lParam)<br />
{<br />
	switch(message)<br />
	{<br />
		case WM_INITDIALOG:<br />
			return TRUE;<br />
		case WM_COMMAND:<br />
			switch (LOWORD (wParam))<br />
			{<br />
				case IDOK:<br />
				case IDCANCEL:<br />
					EndDialog(hDlg, 0);<br />
					return TRUE;<br />
			}<br />
	}<br />
}<br />

case BTN_PRINT:<br />
	      CreateDialog(hInst, MAKEINTRESOURCE(IDD_PRINT), NULL, (DLGPROC) PrintDialog);<br />
<br />

static <font color="Red">INT_PTR</font> CALLBACK PrintDialog( HWND hDlg , UINT message , WPARAM wParam , LPARAM lParam)
{
    switch(message)
    {
    case WM_INITDIALOG:
        return TRUE;
    case WM_COMMAND:
        switch (LOWORD (wParam))
        {
            case IDOK:
            case IDCANCEL:
                EndDialog(hDlg, 0);
                return TRUE;
        }
    }

    <font color="Red">return FALSE;</font>
}

Mark Salsbery
Microsoft MVP - Visual C++