Cannot find the header file during codeblocks compilation?

Cannot find the header file during codeblocks compilation? -- Linux general technology-Linux technology and application information. For details, refer to the following section. Install a ubuntu system on the virtual machine, and then install codeblocks.
Create a project in the console. Isn't it a self-built Hello program? The header file cannot be found during running.
Create a project under wxWidgets and run its own program. It also prompts that the header file cannot be found.
I heard that the path contained in the header file is incorrect? So where should I set it?
Or, if these header files do not exist, where should I go?
Thank you...