1>c:\documents and settings\brandon\my documents\visual studio 2005\projects\psdktesting2\main.cpp(40) : error C2440: '=' : cannot convert from 'const char [14]' to 'LPCWSTR'

1>        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast


1>c:\documents and settings\brandon\my documents\visual studio 2005\projects\psdktesting2\main.cpp(46) : error C2664: 'MessageBoxW' : cannot convert parameter 2 from 'const char [28]' to 'LPCWSTR'

1>        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

1>c:\documents and settings\brandon\my documents\visual studio 2005\projects\psdktesting2\main.cpp(57) : error C2664: 'CreateWindowExW' : cannot convert parameter 2 from 'const char [14]' to 'LPCWSTR'

1>        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

1>c:\documents and settings\brandon\my documents\visual studio 2005\projects\psdktesting2\main.cpp(62) : error C2664: 'MessageBoxW' : cannot convert parameter 2 from 'const char [24]' to 'LPCWSTR'

1>        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

1>c:\documents and settings\brandon\my documents\visual studio 2005\projects\psdktesting2\main.cpp(75) : warning C4244: 'return' : conversion from 'WPARAM' to 'int', possible loss of data

#include <windows.h>

const char g_szClassName[] = "myWindowClass";

// Step 4: the Window Procedure
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch(msg)
    {
        case WM_CLOSE:
            DestroyWindow(hwnd);
        break;
        case WM_DESTROY:
            PostQuitMessage(0);
        break;
        default:
            return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASSEX wc;
    HWND hwnd;
    MSG Msg;

    //Step 1: Registering the Window Class
    wc.cbSize        = sizeof(WNDCLASSEX);
    wc.style         = 0;
    wc.lpfnWndProc   = WndProc;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance     = hInstance;
    wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = g_szClassName;
    wc.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

    if(!RegisterClassEx(&wc))
    {
        MessageBox(NULL, "Window Registration Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    // Step 2: Creating the Window
    hwnd = CreateWindowEx(
        WS_EX_CLIENTEDGE,
        g_szClassName,
        "The title of my window",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
        NULL, NULL, hInstance, NULL);

    if(hwnd == NULL)
    {
        MessageBox(NULL, "Window Creation Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    // Step 3: The Message Loop
    while(GetMessage(&Msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }
    return Msg.wParam;
}

// LPCSTR to LPCWSTRLPCSTR _lpa;    // Here's how to fix that issue! simple, eh?int _convert;LPCWSTR Dest;LPCSTR Source="Yo, world.";Dest=A2W(Source);/* use Dest, it's now an LPCWSTR that contains "Yo, world."! */// LPCSTR to LPWSTR// LPSTR to LPWSTR// char* to PTBYTE// ... to ..../* these are the same as above! */

// LPCWSTR to LPCSTRLPCWSTR _lpw;int _convert;LPCSTR Dest;LPCWSTR Source=L"Yo, world.";Dest=W2A(Source);/* use Dest, it's now an LPCSTR that contains "Yo, world."! */// LPCWSTR to LPWSTR// LPWSTR to LPWSTR//  wchar_t* to CHAR*// ... to ..../* these are the same as above! */

LPSTR Hello="Hello, world!";              // this works just fine.LPSTR Hello2=Hello1;                      // this is fine but keep in mind that they are essentially the same thing now.LPCWSTR HelloW="Hello, world!";           // this does NOT work. It will come out garbled if it even compiles without error.LPCWSTR HelloW2=L"Hello, world!";         // this will work, the text will end up correct due to feeding it into the macro.LPCWSTR HelloW3=TEXT("Hello, world!");    // exact same meaning as HelloW2. =]LPCWSTR HelloW3=__TEXT("Hello, world!");  // exact same meaning as HelloW2 again. ^.^