[lazarus] Non-visual component drawing

[Micha Nelissen]

Mattias Gaertner wrote:

> On Mon, 27 Oct 2003 16:23:16 +0100
> Micha Nelissen <M.Nelissen at student.tue.nl> wrote:
>>
>>On second thought, it does get executed, but GetDeviceSize is not 
>>implemented for win32, because it is not possible to retrieve the size 
>>of a device context given a specific handle. Please advise :(.
> 
> 
> Is it possible to find out, if a handle is a window and return the size?

The handle is a device context, an HDC. It is possible to find out the 
size of a window, for example using GetWindowRect, but that function 
wants an HWND, not an HDC.

 > Otherwise return false.

The return value of GetDeviceSize isn't used (and the default 
implementation returns false already).

Micha.