GTK and OpenCV winter shutdown goals

I've been programming in C for ~6 years, I have so many nice functions tucked away so I'm getting stuck in my ways. I have some time off and would like to learn how to use GTK and openCV. I'v never been good at downloading and Linking Libraries. I have tried both in the past with no luck. I know if i post to the specific forum I will just get told not to use basic C any more. so I'm setting up shop here. I'm using CodeBlocks on a Linux PC and a raspberry pi. I know I'm not asking a question (yet) I'm just starting a thread to post my questions to.

So far luck with the GTK part. Raspberry pi 3 with Jessie, Code::Blocks 13.12.
From terminal the obligatory:

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sudo apt-get update

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then:

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sudo apt-get install libgtk2.0-dev

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I then made a file hellogtk.c with the code:

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#include <gtk/gtk.h>

int main(int argc, char *argv[])
{
    GtkWidget *window;


    gtk_init(&argc, &argv);
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_widget_show(window);


    gtk_main();


    return(0);
}

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source
then I could compile the program from terminal with:

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gcc hellogtk.c -o hellogtk `pkg-config --cflags --libs gtk+-2.0`

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To get Code::Blocks to compile it I found this
Click 'settings' then 'Compiler...' then add

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`pkg-config --cflags gtk+-2.0 `

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to the 'Other options' field
Then click 'linker settings' and add

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`pkg-config --libs gtk+-2.0 `

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to the 'other linker options'
Now I can compile GTK code from Code::Blocks. Next step is getting it to do something useful.

This is the C programming board, so I doubt anyone will tell you "don't use C".

Quote:

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Originally Posted by scootergarrett

Now I can compile GTK code from Code::Blocks. Next step is getting it to do something useful.

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You might want to follow the official GTK+2 tutorial. If you can understand all of the examples here then you should be in good shape:
GTK+ 2.0 Tutorial