Add tooltip in C++ - c++

Question

I'm trying to implement a tooltip for a DlgItem and it is not working, no text is showing.
I tried with this function :
HWND CreateToolTip(int toolID, HWND hDlg, PTSTR pszText)
{
if (!toolID || !hDlg || !pszText)
{
return FALSE;
}
// Get the window of the tool.
HWND hwndTool = GetDlgItem(hDlg, toolID);
// Create the tooltip. g_hInst is the global instance handle.
HWND hwndTip = CreateWindowEx(NULL, TOOLTIPS_CLASS, NULL,
WS_POPUP | TTS_ALWAYSTIP | TTS_BALLOON,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
hDlg, NULL,
GetModuleHandle(NULL), NULL);
if (!hwndTool || !hwndTip)
{
return (HWND)NULL;
}
// Associate the tooltip with the tool.
TOOLINFO toolInfo = { 0 };
toolInfo.cbSize = sizeof(toolInfo);
toolInfo.hwnd = hDlg;
toolInfo.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
toolInfo.uId = (UINT_PTR)hwndTool;
toolInfo.lpszText = pszText;
SendMessage(hwndTip, TTM_ADDTOOL, 0, (LPARAM)&toolInfo);
return hwndTip;
}
And I call this function like this :
CreateToolTip(ITEM_ID, this->m_hWnd, L"MY_TEXT");
But the tooltip isn't here.
Do you have any ideas ?
Thanks in advance,
J

Answer 1

I was able to use this code to work normally, I think you did not generate the manifest file, causing the SendMessage(hwndTip, TTM_ADDTOOL, 0, (LPARAM)&toolInfo); call to fail.
If you are using Visual Studio, go to project properties:
Project -> Properties -> Linker -> Manifest -> Generate Manifest file: Yes
Then add the list style, refer to Enabling Visual Styles:
#pragma comment(linker,"\"/manifestdependency:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
Finally it worked for me: