This is the third post of hair, or roughly describe the problem, the compiler for VS2015:
I need to develop a data driver DLL, so USES is the new DLL project, initial # import "XX. OCX component method, CoCreateInstance success, a call interface is abnormal, but considering the method may be OCX rely on MFC, so give up
Now the new is MFC DLL project, add a dialog box, class called ContainerDlg, the selected dialog - & gt; Right-click to choose insert ActiveX controls, after adding the control, to select the control - & gt; Right click select add variables, the compiler automatically generated control class CDctlctrl1, and in the parent dialog ContainerDlg automatically add a variable DCTL
The following is the parent dialog code the header file

 
//ContainerDlg dialog
The class ContainerDlg: public CDialog 
{
DECLARE_DYNAMIC (ContainerDlg) 

Public: 
PParent ContainerDlg (CWnd *=NULL);//standard constructor 
Virtual ~ ContainerDlg (); 

//data dialog 
# ifdef AFX_DESIGN_TIME 
Enum {IDD=IDD_DIALOG1}; 
# endif 

Protected: 
Virtual void DoDataExchange (CDataExchange * symbol;//support DDX/DDV 

DECLARE_MESSAGE_MAP () 
Public: 
CDctlctrl1 DCTL;//object controls generated 
}; 

The following is a control class code

 class CDctlctrl1: public CWnd 
{
Protected: 
DECLARE_DYNCREATE (CDctlctrl1) 
Public: 
Clsids const& GetClsid () 
{
The static clsids const clsids 
X11d1 x3fce x22842328={0, 0, 0, {x93 0 x9b, 0, 0 x0, 0 x20, 0 xaf, 0 x52, 0 x4f, 0 xa5}}; 
Return clsids; 
} 
Virtual BOOL Create (LPCTSTR lpszClassName, LPCTSTR lpszWindowName, dwords dwStyle, 
Const RECT& The rect, CWnd * pParentWnd, UINT nID, 
CCreateContext * pContext=NULL) 
{
Return CreateControl (GetClsid (), lpszWindowName dwStyle, the rect, pParentWnd, nID); 
} 

BOOL Create (LPCTSTR lpszWindowName dwords dwStyle, const RECT& The rect, CWnd * pParentWnd, 
UINT nID, CFile * pPersist=NULL, BOOL bStorage=FALSE, 
BSTR bstrLicKey=NULL) 
{
Return CreateControl (GetClsid (), lpszWindowName dwStyle, the rect, pParentWnd, nID, 
PPersist bStorage, bstrLicKey); 
} 

//feature 
//think enumeration and interface code, only posted a 
Long GetLastError () 
{
Long the result; 
GetProperty (0 xa, VT_I4, (void *) & amp; The result); 
return result; 
} 

Then I also defines a Driver action class Driver, the Driver defines the dialog containerdlg pointer object, and the constructor new,
Then the Driver class Openlink function interface to call control function, the following

 BOOL Driver: : OpenLink () 
{
Cstrings STR="DDeserver"; 
Cstrings str1=containerdlg - & gt; DCTL. GetLinkTopic ();//function call can succeed, but the function returns an abnormal returns during the implementation of the 
Return 0; 
} 

The following function is abnormal control interface code

 cstrings GetLinkTopic () 
{
Cstrings result; 
GetProperty (0 x3, VT_BSTR (void *) & amp; The result);//every time this place to Debug an Assertion Failed exception 
return result; 
} 

This exception, of course, also may be the result of my development environment, because it is the first time use controls development, so I want to ask next my this loading OCX and call interface method itself if you have any questions? Which didn't make the result in abnormal?

CodePudding user response:

Is not enough to just new dialog object, ocx control has not been created,

CodePudding user response:

The

reference 1/f, Dobzhansky response:

is not enough to just new dialog object, ocx control has not been created,

For the first time I use OCX development, so don't know, whether to call the Create function to Create the control in the control class?

CodePudding user response:

You first as a modal dialog box, according to the function to achieve the first say