This method, recommended by @Remy Lebeau, also works well, and is arguably simpler than my first answer, though both work. I'll leave my original solution in place though, as it has the (arguable) advantage that the familiar call to wmain() remains in place, in traditional form. My first solution also has a slight advantage in not requiring shellapi, though in many of my applications I end up using it anyway...

//  build: g++ -Wall -O2 -DUNICODE -D_UNICODE wmain.cpp -o wmain.exe -lshlwapi
#include <windows.h>
#include <stdio.h>
#include <shellapi.h>

int main(void) 
{
    LPWSTR *szArglist;
    int nArgs;

    // Get the command line string
    LPWSTR commandLine = GetCommandLineW();

    // Convert the command line string to an array of arguments
    szArglist = CommandLineToArgvW(commandLine, &nArgs);

    if (szArglist == NULL) {
        wprintf(L"CommandLineToArgvW failed\n");
        return 1;
    } else {
        for (int i = 0; i < nArgs; i++) {
            wprintf(L"%d: %s\n", i, szArglist[i]);
        }
    }

    // Free the memory allocated by CommandLineToArgvW
    LocalFree(szArglist);

    return 0;
}