user32!MessageBoxA function in Matlab

MessageBoxA.m

if not(libisloaded('user32'))
    loadlibrary('user32.dll', @user32proto);
end

hWnd = uint32(0);
lpText = 'Hello from MATLAB';
lpCaption = 'MATLAB MessageBox';
uType = uint32(0);
result = calllib('user32', 'MessageBoxA', hWnd, lpText, lpCaption, uType);
disp(['MessageBox returned: ', num2str(result)]);

unloadlibrary('user32');

function [fcns, structs, enuminfo] = user32proto
    fcns = []; structs = []; enuminfo = []; fcns.alias = {};
    % Prototype for MessageBoxA
    fcns.name{1} = 'MessageBoxA';
    fcns.calltype{1} = 'cdecl';  % Correct calling convention for Windows API
    fcns.LHS{1} = 'uint32';        % Return type is an unsigned integer
    fcns.RHS{1} = {'uint32', 'cstring', 'cstring', 'uint32'};  % Argument types
end