| File Info |
| Version : |
1.0.0 |
| Support Topic : |
Click Here (0 comments) |
| Demo : |
N/A |
| Screenshot : |
N/A |
| Post Date : |
Jul 10, 2003 |
| Last Edit Date : |
Jul 10, 2003 |
| Language Version : |
VB4, VB5, VB6 |
| Current Rating : |
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| Submitted by |
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| Code Description |
The attached code demonstrates a technique
you can use to create multiline balloon
tooltips for ListView items.
The code is based on the following simple
idea. In the MouseMove event you need to
check the index of the item under the mouse
pointer, and if this item is changed, you
simply redefine the text of the tooltip
attached to the ListView control. Notice that
you should destroy the tooltip if there is no
any item under the mouse pointer.
To determine the index of the list-view item
under the mouse pointer, we send the
LVM_HITTEST message to the ListView control.
The SendMessage function you should use to
send this message returns the index of the
item at the specified position, if any, or -1
otherwise. Before you send the message,
populate the pt field of an instance of the
LVHITTESTINFO structure with the coordinates
of the mouse pointer (you pass the reference
to this structure as the value of the lParam
parameter in SendMessage). You can use for
this purpose the X and Y parameters of the
MouseMove event of the control, but draw
attention at the fact that these parameters
can be measured in twips and you need to
convert them in pixels.
This simple idea can be used to create such
tooltips for ListBox items, any grid control
items and so on. For instance, we use this
technique in extra samples for iGrid ActiveX
Control we produce (this is an editable
replacement for ListView and FlexGrid– visit
www.10Tec.com for more info).
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