Undefined reference to (Quickmail) - c

Question

I am looking for how to install quickmail.
I put quickmail.h here: C:\Program Files\CodeBlocks\MinGW\include, the .a and .la here: C:\Program Files\CodeBlocks\MinGW\lib.
I linked these .a files by adding them in the linker settings. I also did include the library like this: #include <quickmail.h>, but the functions are not recognized.
What should I do ?
The 4 files in the bin folder are in the project folder and I downloaded files from here : quickmail - Sourceforge.
EDIT : I get \main.c|9|undefined reference to '__imp_quickmail_initialize'| \main.c|10|undefined reference to '__imp_quickmail_create'| \main.c|11|undefined reference to '__imp_quickmail_set_body' and I put C:\Program Files\CodeBlocks\MinGW\include in search directories.
This is the code :
#include <stdio.h>
#include <stdlib.h>
#include <quickmail.h>
int main()
{
const char* error;
quickmail_initialize();
quickmail mailobj = quickmail_create("aaa#gmail.com", "libquickmail test e-mail");
quickmail_set_body(mailobj, "This is a test e-mail.\nThis mail was sent using libquickmail.");
quickmail_add_attachment_file(mailobj, "words.txt", NULL);
if ((error = quickmail_send(mailobj, "smtp.gmail.com", 587, "aaa#gmail.com", "MAGA2020")) != NULL)
fprintf(stderr, "Error sending e-mail: %s\n", error);
quickmail_destroy(mailobj);
return 0;
}
Sorry, the site gave me the wrong version.

Answer 1

To use a library you need to include the header in the code (in this case #include <quickmail.h>) and if needed tell the compiler where to find this file (the full path to the lib folder) with the -I compiler flag.
Next you need to tell the linker to link with the library (in this case -lquickmail or -lquickmaillight) and if needed where to find this file (the full path to the lib folder) with the -L linker flag.
Your errors are linker errors, so it seems the second step wasn't properly done.
In Code::Blocks it looks like this (though unlike the screenshots you should set it at the top-level instead of just for Debug builds):