Using Sendmessage with combobox

[BaldrickThe4th]

Hi there

 

I guess I'm trying to be too clever, but I wonder if someone can shed some light on what is happening.

 

I'm loading a combobox with a number of thousands of items. To speed the process up I've tried to use:

SendMessage(ComboBox1.Handle, CB_ADDSTRING, -1, "Some Text")

 

However things don't appear well. The list gets populated, but when clicking on an item in the list I get a subscript error. The dropdown box also only appears to be one line rather than 8.

 

I can go back to useing the combobox.add method, but I'm curious as to what is going on. Any thoughts anyone.

 

Thanks.

[dynamic_sysop]

well , the 3rd parameter should be a zero , not -1 so try ...

SendMessage(ComboBox1.Handle, CB_ADDSTRING, [color=Red][b]0[/b][/color], "Some Text") '/// note i've replaced the [b]-1[/b] with [b]0[/b]

[BaldrickThe4th]

well , the 3rd parameter should be a zero , not -1 so try ...

SendMessage(ComboBox1.Handle, CB_ADDSTRING, [color=Red][b]0[/b][/color], "Some Text") '/// note i've replaced the [b]-1[/b] with [b]0[/b]

 

Thanks

 

I did try that in an earlier attempt but it gave the same results. The error I get is "Specified arguement was out of range of valid values. Parameter name '48' is not a valid value for 'index'.

[BaldrickThe4th]

Digging around a little more I found the comment that Sendmessage deals with "objects" whereas the framework expects "strings". I guess this is the problem. I'm back to the slower but more orthodox add function.

 

Thanks for your help.

[dynamic_sysop]

how are you specifying your SendMessage Function? because you can customize it pretty much to suit your needs, thus making it do it's job of working fast.