LB_SETITEMHEIGHT example message

  • Thread starter Thread starter Peder Y
  • Start date Start date
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Peder Y

Can anyone provide a simple example on how to use a message with LB_SETITEMHEIGHT?

I need to resize a listBox 'cell' at runtime.

Thanks!


- Peder -
 
Peder,
Can anyone provide a simple example on how to use a message with LB_SETITEMHEIGHT?
Click to expand...

[DllImport("user32.dll", CharSet=CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hwnd, uint msg, IntPtr wParam,
IntPtr lParam);

const uint LB_SETITEMHEIGHT = 0x1a0;

....

SendMessage( theListBox.Handle, LB_SETITEMHEIGHT, (IntPtr)index,
(IntPtr)height );



Mattias
 
you don't need to do this in .Net

you can use .Net built-in features to change control properties

what are you trying to do?


Mattias Sjögren said:
Peder,
Can anyone provide a simple example on how to use a message with
Click to expand...
LB_SETITEMHEIGHT?

[DllImport("user32.dll", CharSet=CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hwnd, uint msg, IntPtr wParam,
IntPtr lParam);

const uint LB_SETITEMHEIGHT = 0x1a0;

...

SendMessage( theListBox.Handle, LB_SETITEMHEIGHT, (IntPtr)index,
(IntPtr)height );



Mattias
Click to expand...
 
I'm trying to change the ItemHeight of a single item (say item 3) in a
ListBox. AFAIK this cannot be done without either the message method
or deleting all Items and refilling the list. The control I'm making
is supposed to enlarge the item the mouse is hovering over. Clearly
the last method would be very inefficient for big lists. Hope this
clears things up. If there is a better .Net method, let me know. I
have searched high and low for one and noone seems to know.

Thanks!

- Peder -



gary hitch said:
you don't need to do this in .Net

you can use .Net built-in features to change control properties

what are you trying to do?


Mattias Sjögren said:
Peder,
Can anyone provide a simple example on how to use a message with
Click to expand...
LB_SETITEMHEIGHT?

[DllImport("user32.dll", CharSet=CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hwnd, uint msg, IntPtr wParam,
IntPtr lParam);

const uint LB_SETITEMHEIGHT = 0x1a0;

...

SendMessage( theListBox.Handle, LB_SETITEMHEIGHT, (IntPtr)index,
(IntPtr)height );



Mattias
Click to expand...
Click to expand...
 
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