What is the method to display a basic (yet personalized) dialog box in a c++ program I have created?

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One method to display a basic (yet personalized) dialog box in a C++ program is to use the WinAPI functions. Here's an example:

#include <windows.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    int result = MessageBox(NULL, "Hello, world!", "My Dialog Box", MB_ICONINFORMATION | MB_OKCANCEL);

    if (result == IDOK)
    {
        // OK button was clicked
    }
    else if (result == IDCANCEL)
    {
        // Cancel button was clicked
    }

    return 0;
}

In this example, we use the MessageBox() function to display a dialog box with a message, a title, and OK/Cancel buttons. The MB_ICONINFORMATION flag specifies that an information icon should be displayed. The result of the user's choice is stored in the result variable, which we can use to perform some action based on the choice.

Note that this code uses the WinMain entry point instead of the usual main function, and also includes the windows.h header file, which provides the necessary functions and constants for working with the Windows API.