c++ build errors on win32 school application
I haven't been programming in c++ very long, but need to make an Win32
application for my school. The teacher helped me a lot with information
but after a few days of trying I am still stuck.
Errors:
error C2440: '=' : cannot convert from 'const char [11]' to 'LPCWSTR'
error C2664: 'CreateWindowExW' : cannot convert parameter 2 from 'const
char [11]' to 'LPCWSTR'
error C2664: 'TextOutW' : cannot convert parameter 4 from 'char *' to
'LPCWSTR'
IntelliSense: argument of type "char *" is incompatible with parameter of
type "LPCWSTR"
Don't know if all the other suff is right, but i only get those 4 error now
cpp file:
/* Hoofdstuk 10, User Interface */
#include "Callback_NYCM.h"
// UI
int WINAPI WinMain(HINSTANCE thisInstance,HINSTANCE prevInstance,LPSTR
lpCmdLine,int nShowCmd)
{
PAINTSTRUCT ps;
HDC hdc;
MSG msg;
HWND hwnd;
WNDCLASSEX wndclassex; //struct_WNDCLASSEX via windows.h
// toekenning
wndclassex.cbSize = sizeof(WNDCLASSEX);
wndclassex.style = CS_HREDRAW | CS_VREDRAW;
wndclassex.lpfnWndProc = WndProc;
wndclassex.cbClsExtra = 0;
wndclassex.cbWndExtra = 0;
wndclassex.hInstance = thisInstance;
wndclassex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclassex.hCursor = LoadCursor(thisInstance,IDC_ARROW);
wndclassex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wndclassex.lpszMenuName = NULL;
wndclassex.lpszClassName = "WNDCLASSEX";
wndclassex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
// functie aanroep
RegisterClassEx(&wndclassex);
// IfThen -> CreateWindows
if(!(hwnd = CreateWindowEx(NULL,"WNDCLASSEX","Hoofdstuk
10",WS_OVERLAPPEDWINDOW
| WS_VISIBLE,50,50,650,300,NULL,NULL,thisInstance,NULL)))
{
return 0;
}
// logische structuur
while(GetMessage(&msg, NULL, 0, 0))
{
if(msg.message == WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int) msg.wParam;
};
header file:
/*Hoofdstuk 10, Deelnemer.h*/
//Declaratie
class Deelnemer
{
private:
char* nm;
public:
//Constructor
Deelnemer(){
}
//Methoden = prototype
void Deelnemer::Invoeren();
char* Deelnemer::WeergevenNaam();
};
//Implemenmtatie.Invoeren
void Deelnemer::Invoeren()
{
nm = "Roy";
}
//.Weergeven
char* Deelnemer::WeergevenNaam()
{
return nm;
}
callback_NYCM.h:
/*Hoofdstuk 10, Callback_NYCM*/
#include "Windows.h"
#include "Deelnemer.h"
// prototype
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wparam,LPARAM lparam);
//Implementatie
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wparam,LPARAM lparam)
{
//Constructie
PAINTSTRUCT ps;
HDC hdc;
MSG msg;
WNDCLASSEX wndclassex;
// HWND hwnd;
Deelnemer deelnemer1;
//UI
switch(message)
{
case WM_PAINT:
{
//Functieaanroep.Initialisatie
deelnemer1.Invoeren();
//.TextOut
TextOut(hdc,50,50,deelnemer1.WeergevenNaam(),
strlen(deelnemer1.WeergevenNaam()));
EndPaint(hwnd,&ps);
return 0;
}
break;
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}
break;
default:
{
return DefWindowProc(hwnd,message,wparam,lparam);
}
break;
}
return 0;
}
I think my constructor or something like that is wrong and my return value
for char* Deelnemer::WeergevenNaam()
Could somebody explain me what is wrong in my code so I know how to get it
working?
UPDATE:
Updating your application requires to use UNICODE string literals
throughout, i.e. L"MyString" instead of "MyString". You also need to use
WCHAR/wchar_t in place of char
But how do i do this with my code, could somebody help?
UPDATE 2: That solved al lot of errors!
But i have some more errors left in this part
Deelnemer deelnemer1;
switch(message)
{
case WM_PAINT:
{
//Functieaanroep.Initialisatie
deelnemer1.Invoeren();
//.TextOut
TextOut(hdc,50,50,deelnemer1.WeergevenNaam(),
strlen(deelnemer1.WeergevenNaam()));
EndPaint(hwnd,&ps);
return 0;
}
-- deelnemer1.WeergevenNaam() is not working: -TextOutW' : cannot convert
parameter 4 from 'char *' to 'LPCWSTR' -IntelliSense: argument of type
"char *" is incompatible with parameter of type "LPCWSTR"
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