C++ Add A Bitmap from resource to Picture Control - c++

Question

i want to display a bitmap on my Picture control,
but actually no matter what Im trying, it doesnt work.
Right now my method looks like this:
SendDlgItemMessage(hWnd ,picture_CTRL, BM_SETIMAGE , IMAGE_BITMAP, (LPARAM) MAKEINTRESOURCE(IDB_BITMAP1));
I have also already tried to use the
STM_SETIMAGE
Message, but it wont work as well.
My Picture Control property "Type" is set to "Bitmap" and my Bitmap has an ID in resource.h
Hope you guys can help :)

Answer 1

First, you can't just mix and match messages in standard Windows controls. BM_SETIMAGE and STM_SETIMAGE have completely different values. If you are using a Static control, use STM_SETIMAGE. If you are using a Button control, use BM_SETIMAGE.
Second, the documentation for STM_SETIMAGE says that the LPARAM must be a handle to the image. You are passing a resource ID. You need to get the handle by calling LoadImage first. For example:
HBITMAP hBitmap = reinterpret_cast<HBITMAP>(LoadImage(
GetModuleHandle(NULL),
MAKEINTRESOURCE(IDB_BITMAP1),
IMAGE_BITMAP,
0,
0,
0));
SendDlgItemMessage(
hWnd,
picture_CTRL,
STM_SETIMAGE,
IMAGE_BITMAP,
reinterpret_cast<LPARAM>(hBitmap));
Note that according to the documentation you are responsible for deleting the bitmap when you are done with it.
EDITS: Note that I had two problems in my original version of the code, both caused by copying and pasting from the question. I failed to pass the handle as the LPARAM myself and I used BM_SETIMAGE instead of STM_SETIMAGE. I will also add a note in the answer that, as Cody Gray pointed out, the MSDN documentation for a function or message will tell you whether you can use MAKEINTRESOURCE.