Supporting ToolTips

You can add ToolTips support to your toolbar by specifying the TBSTYLE_TOOLTIPS style and creating a string table in your RC file that contains the text to display. You then process the WM_NOTIFY message that is sent to the parent window procedure of the toolbar, as shown in the following code:

case WM_NOTIFY:

switch (((LPNMHDR)lParam)->code) 

{

case TTN_NEEDTEXT: 

// Display the ToolTip text.

lpToolTipText = (LPTOOLTIPTEXT)lParam;

LoadString (hInst, 

lpToolTipText->hdr.idFrom, // string ID == cmd ID

szBuf,

sizeof (szBuf));

lpToolTipText->lpszText = szBuf;

break;

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This step is a bit different for those developing in MFC. The standard lists currently provided with MFC do not include the WM_NOTIFY message. As a result, you need to put a function directly into the view class:

LRESULT CMfctoolView::WindowProc (UINT message, WPARAM
wParam, 

LPARAM lParam) 

{

static CHAR szBuf [128];

LPTOOLTIPTEXT lpToolTipText;



if (message == WM_NOTIFY)

{

switch (((LPNMHDR)lParam)->code) 

{

case TTN_NEEDTEXT: 

// Display the ToolTip text.

lpToolTipText = (LPTOOLTIPTEXT)lParam;

::LoadString (AfxGetResourceHandle (), 

lpToolTipText->hdr.idFrom, // string ID == cmd ID

szBuf,

sizeof (szBuf));

lpToolTipText->lpszText = szBuf;

break;

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