Programming

Title:       Display ToolTip in any place of the screen
Author:      Zarembo Maxim
Environment: VC++ 6.0, NT 4.0, Win9x, Win2k
Section      Miscellaneous Controls
SubSection   Tooltips

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• Download source - 18 Kb

Here you can finding programm, that made on the basis this source.

Display ToolTip in any place of the screen.

It is originally necessary to create a window of class TOOLTIPS_CLASS, then to fill structure TOOLINFO:

typedef struct tagTOOLINFO{
	UINT      cbSize; 
	UINT      uFlags; 
	HWND      hwnd; 
	UINT_PTR  uId; 
	RECT      rect; 
	HINSTANCE hinst; 
	LPTSTR    lpszText; 
    #if (_WIN32_IE >= 0x0300)
	LPARAM lParam;
    #endif
} TOOLINFO, NEAR *PTOOLINFO, FAR *LPTOOLINFO;

We determine two parameters in this structure which have for us interest uFlags and lpszText.
uFlags it is chosen equal TTF_TRACK, that means an opportunity of use of a sending messages choosing a position for ToolTip and visibility.
lpszText - the task of the text which we want display.

Now we send the message in system, about desire to create the emerging help where we transfer the reference to our structure TOOLINFO

SendMessage(hwndTT, TTM_ADDTOOL, 0, (LPARAM)(LPTOOLINFO)*ti);

Then we send message TTM_TRACKPOSITION which sets coordinates of ToolTip

SendMessage(hwndTT, TTM_TRACKPOSITION, 0, (LPARAM)(DWORD)MAKELONG(m_x, m_y));

And in last turn we send the message on activization ToolTip

SendMessage(hwndTT, TTM_TRACKACTIVATE, true, (LPARAM)(LPTOOLINFO)*ti);