[Lazarus] How can use TControl.Perfom(Perform(LM_KEYUP, VK_UP, 1);

[Mattias Gaertner]

On Sat, 08 Mar 2014 13:04:34 +0200
FreeMan <freeman35 at delphiturkiye.com> wrote:

> Hello,
> In my TExLookUp Component I need to sent key stroks to subcomponent 
> Grid. How can I do this. Its has to be crossplatform too.
> Example:
> TExLookUp.EditKeyUp(........
> ...
>    if Key=VK_UP   then FGrid.Perform(LM_KEYUP, VK_UP, 1);
>    if Key=VK_DOWN then FGrid.Perform(LM_KEYDOWN, VK_DOWN, 1);
> or how?
> For testing, on new application, one db grid (its showing some data from 
> datasource) and two button has on Tform. On buttonclick event has 
> Grid.Perform(LM_KEYDOWN, VK_DOWN, 1);  and other has 
> Grid.Perform(LM_KEYUP, VK_UP, 1);  but not working this codes. no any error.
> my system is Kubuntu 13.10 x64 Lazarus and fpc last svn version and QT 
> widgetset.
> has anyone got any suggestion or idea?

Do you want to emulate keystrokes or do you want the grid to go one
row up/down?

Mattias