Accessing windows .rc/.res resources
lazarus / 34-Windows

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chucky · 2013-08-28 20:06

I am using the LCL that shipped with Lazarus 1.0.8. and fpc 2.6.2. I
am not using the IDE. I have included a .res file in the executable
that contains a bitmap of 16x16 icons which I wish to dynamically load
into the image list of a TTreeView. The low level resource functions
with fpc require the handle to the module that contains the res file.
(which is this case is the executable).

How do I obtain the handle to the executable? There is no
Application.handle. The MainForm.Handle does not work either.

I can load the bitmap with:

var
  S: TResourceStream;

  S := TResourceStream.Create(HInstance, 'mybit', RT_BITMAP);

But I can't figure out how to get this into the TTreeView.Images

The function AddLazarusResource does not work on a resource compiled
with windres or GoRC

Can anyone help me?

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taazz · 2013-08-28 20:16

the images property is a place holder it does not provide an image
list you have to create one your self and attach it there. If this is
taken care of aka the images property has been assigned, then you need
to use the add method of the imagelist component to append an existing
bitmap to the list, you can always load the image from the
resourcestream using the TBitmap.LoadFromStream method.