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manc
Grandmaster Cheater
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Joined: 16 Jun 2006
Posts: 551
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 Posted: Tue Jul 29, 2008 10:44 pm Post subject: [C++] 'Simple Window' Errors |
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I'm following theForger's Win32 tutorial, and I slapped this source below into MSVC++ 2008 and came up with these errors:
(41) : error C2664: 'MessageBoxW' : cannot convert parameter 2 from 'const char [28]' to 'LPCWSTR'
(51) : error C2664: 'CreateWindowExW' : cannot convert parameter 2 from 'const char [14]' to 'LPCWSTR'
(55) : error C2664: 'MessageBoxW' : cannot convert parameter 2 from 'const char [24]' to 'LPCWSTR'
All of them tell me: | Quote: | | Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast |
Although I don't see how I can type-cast as they're aren't being assigned new values. I did fix one error using type-casting where I made my comment in the code.
| Code: | #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 = (LPCSTR)/*had to add for mvc++*/ g_szClassName;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if(!RegisterClassEx(&wc))
{
MessageBox(NULL, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK); //Line 41 Error <<<<<<<<<<<<<
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); //Line 51 error<<<<<<<<<<<<<<<<<
if(hwnd == NULL)
{
MessageBox(NULL, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK); //Line 55 error<<<<<<<<<<<<
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;
} |
By the way, Dev-C++ compiles this PERFECTLY without a single error.
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oib111
I post too much
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Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?
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| Posted: Tue Jul 29, 2008 10:49 pm Post subject: |
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VC++ compiles in Unicode by default. Go to View->Property Pages->Configuration Properties->General->Character Set = Using Multi-Byte Character Set
_________________
| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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lurc
Grandmaster Cheater Supreme
 Reputation: 2
Joined: 13 Nov 2006
Posts: 1900
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| Posted: Tue Jul 29, 2008 10:55 pm Post subject: |
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Either that or start using UNICODE. Include tchar.h to the file and then use _T, _TEXT, or TEXT in front of all your strings. Like so:
CreateWindowEx( 0, _T("WindowClass"), _T("WindowTitle"), ... );
These macro's will add an 'L' in front of the string making it UNICODE.
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manc
Grandmaster Cheater
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Joined: 16 Jun 2006
Posts: 551
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| Posted: Tue Jul 29, 2008 11:00 pm Post subject: |
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Oh, thanks. Problem solved.You told me to do this before so I figured it would have still been on Multi-Byte. Do I have to change it every time I open it? And lastly, is there a hotkey/button to run the program after its compiled or do I have to hunt it down in my project folder =\
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oib111
I post too much
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Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?
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| Posted: Tue Jul 29, 2008 11:05 pm Post subject: |
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You only have to change it every time you make a project, but not every time you open a project. And hit F5 to Build and Run the program.
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| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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sponge
I'm a spammer
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Joined: 07 Nov 2006
Posts: 6009
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| Posted: Tue Jul 29, 2008 11:10 pm Post subject: |
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Learn to indent.
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manc
Grandmaster Cheater
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Joined: 16 Jun 2006
Posts: 551
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| Posted: Tue Jul 29, 2008 11:15 pm Post subject: |
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| sponge wrote: | | Learn to indent. |
Yeah, sorry about the block of code. Copied from a .pdf into MSVC++ then from MSVC++ onto CEF and it just came out that way.
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Noz3001
I'm a spammer
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Joined: 29 May 2006
Posts: 6220
Location: /dev/null
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| Posted: Wed Jul 30, 2008 3:59 am Post subject: |
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| Stick to unicode and use _T(). It doesnt take much more time =|.
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