"C #" uses the User32.dll MessageBox popup message

To use User32.dll's MessageBox popup messages, you naturally need to introduce user32.dll into your project.

One of the simplest examples is as follows:

usingSystem;usingSystem.Runtime.InteropServices;classexample{//Use DllImport to import the Win32 MessageBox function.[DllImport ("user32.dll", CharSet =CharSet.Unicode)] Public Static extern intMessageBox (IntPtr hWnd, string text, string caption,UINTtype); Static voidMain () {//Call the MessageBox function using platform invoke.MessageBox (NewINTPTR (0),"Hello world!","Hello Dialog",0); }}

After the project is run, pop-up popup messages directly.

This is a method in C # that uses an external DLL, and the user32.dll is not shown in the project's reference.

"C #" uses the User32.dll MessageBox popup message