WTL Adding a tooltip to a dynamically created button

Question

I've been working on a modal dialog using the Windows Template Library where I need to dynamically create buttons and add tool-tips to them. I can't seem to find the correct way to do this:

// CMyDialog.h
#pragma once
#include "stdafx.h"

class CMyDialog : public CDialogImpl<CIdleDialog> {

public:

    enum { IDD = IDD_IDLEDIALOG };

protected:

    BEGIN_MSG_MAP(CMyDialog)
    MESSAGE_HANDLER(WM_INITDIALOG, OnInitDialog)
    END_MSG_MAP()

    LRESULT OnInitDialog(UINT uMsg, WPARAM wParam, LPARAM lParam,
                         BOOL &bHandled)
    {
        CRect dialog_rect(0, 0, 600, 400);
        MoveWindow(&dialog_rect);
        CenterWindow();

        CButton btn;
        CRect btn_rect(10, 10, 200, 30);
        btn.Create(this->m_hWnd, btn_rect, L"Test Button",
                   WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | BS_FLAT, NULL,
                   BTN_ID_OFFSET + 1);

        CToolTipCtrl tooltip;
        tooltip.Create(this->m_hWnd, rcDefault, NULL,
                       TTS_BALLOON | TTS_NOPREFIX);

        TOOLINFO ti = {sizeof(ti)};
        ti.hwnd = this->m_hWnd;
        ti.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
        ti.uId = (UINT_PTR)btn.m_hWnd;
        ti.lpszText = (LPWSTR)L"THIS IS A TOOLTIP";
        if (!tooltip.AddTool(&ti)) {
            ocdbg("Could not add tooltip to button.\n");
        }
        tooltip.Activate(TRUE);

        return TRUE;
    }
};

For how I run this dialog:

// main.cpp
#include "stdafx.h"
#include "CMyDialog.h"

CAppModule _Module;

int WINAPI wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance,
                    _In_ PWSTR pCmdLine, _In_ int nCmdShow)
{
    AtlInitCommonControls(ICC_COOL_CLASSES | ICC_BAR_CLASSES);
    HRESULT h_res = _Module.Init(NULL, hInstance);

    {
        CMyDialog dialog;
        dialog.DoModal();
    }

    _Module.Term();
    return 0;
}

The call to tooltip.AddTool(&ti) returns 0 which notes a failure. I'm assuming this is because the button is not in my resource.h file. Any ideas?

Answer 1

I have solved this by following this article https://learn.microsoft.com/en-us/windows/win32/controls/cookbook-overview and adding this to the top of my dialog's header.

#pragma comment(linker,"\"/manifestdependency:type='win32' \
name='Microsoft.Windows.Common-Controls' version='6.0.0.0' \
processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")

Everything is working fine now!