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Question: Using an ocx in a console application


I want to quickly test an ocx. How do I drop that ocx in a console application. I have found some tutorials in CodeProject and but are incomplete.

Question author Rptony | Source



Sure..it's pretty easy. Here's a fun app I threw together. I'm assuming you have Visual C++.

Save to test.cpp and compile: cl.exe /EHsc test.cpp

To test with your OCX you'll need to either #import the typelib and use it's CLSID (or just hard-code the CLSID) in the CoCreateInstance call. Using #import will also help define any custom interfaces you might need.

#include "windows.h"
#include "shobjidl.h"
#include "atlbase.h"

// compile with:  cl /EHsc test.cpp

// A fun little program to demonstrate creating an OCX.
// (CLSID_TaskbarList in this case)

BOOL CALLBACK RemoveFromTaskbarProc( HWND hwnd, LPARAM lParam )
    ITaskbarList* ptbl = (ITaskbarList*)lParam;
    return TRUE;

void HideTaskWindows(ITaskbarList* ptbl)
    EnumWindows( RemoveFromTaskbarProc, (LPARAM) ptbl);

// ============

BOOL CALLBACK AddToTaskbarProc( HWND hwnd, LPARAM lParam )
    ITaskbarList* ptbl = (ITaskbarList*)lParam;

    return TRUE;// continue enumerating

void ShowTaskWindows(ITaskbarList* ptbl)
    if (!EnumWindows( AddToTaskbarProc, (LPARAM) ptbl))
    	throw "Unable to enum windows in ShowTaskWindows";

// ============

int main(int, char**)

    try {
    	CComPtr<IUnknown> pUnk;

    	if (FAILED(CoCreateInstance(CLSID_TaskbarList, NULL, CLSCTX_INPROC_SERVER|CLSCTX_LOCAL_SERVER, IID_IUnknown, (void**) &pUnk)))
    		throw "Unabled to create CLSID_TaskbarList";

    	// Do something with the object...

    	CComQIPtr<ITaskbarList> ptbl = pUnk;
    	if (ptbl)

    	MessageBox( GetDesktopWindow(), _T("Check out the task bar!"), _T("StackOverflow FTW"), MB_OK);
    catch( TCHAR * msg ) {
    	MessageBox( GetDesktopWindow(), msg, _T("Error"), MB_OK);


    return 0;
Answer author Jschroedl

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