Pelles C forum

C language => Windows questions => Topic started by: p b das on July 19, 2017, 05:44:09 pm

Title: compiling error in a windows program : CreateWindow Function
Post by: p b das on July 19, 2017, 05:44:09 pm
The following program gives error while attempted to compile   using Pelles C:


 
Code: [Select]
#include<windows.h>
  int  _stdcall WinMain ( HINSTANCE hinstance, HINSTANCE hPrevInstance,
                                      LPSTR  lpszCmdline, int nCmdShow )
 {   
       
           HWND h[10] ;
            int x ;

          for ( x = 0; x <= 9 ; x++ )
           {
                 h[x] =  CreateWindow ( "BUTTON" , "Press Me" ,
                                                        WS_OVERLAPPEDWINDOW , x *20,
                                                        x*20 , 150 , 100 , 0 , 0 , h , 0 ) ;
                ShowWindow ( h[x] , nCmdShow  );

             }

             MessageBox ( 0 , "Hi !" , "Waiting" , 0 ) ;
              return 0 ;
 

The compiling error is as under  :


  error #2140: Type error in argument 11 to 'CreateWindowExA'; expected 'struct HINSTANCE__ *' but found 'HWND'.
*** Error code: 1 ***

Solution solicited



Title: Re: compiling error in a windows program : CreateWindow Function
Post by: TimoVJL on July 19, 2017, 09:42:33 pm
CreateWindow is a macro using CreateWindowEx, so
Code: [Select]
h = CreateWindowEx(
0, // 1 DWORD dwExStyle
"BUTTON", // 2 LPCTSTR lpClassName
"Press Me", // 3 LPCTSTR lpWindowName
WS_OVERLAPPEDWINDOW, // 4 DWORD dwStyle
x * 20, // 5 int x
x * 20, // 6 int y
150, // 7 int nWidth
100, // 8 int nHeight
0, // 9 HWND hWndParent
0, // 10 HMENU hMenu
h, // 11 HINSTANCE hInstance
0); // 12 LPVOID lpParam
and h is an array of HWNDs, not HWND.
Title: Re: compiling error in a windows program : CreateWindow Function
Post by: jj2007 on July 20, 2017, 01:12:26 pm
Solution solicited

This is not a paid help forum. You should learn reading the manuals.

Code: [Select]
                 h[x] = CreateWindowA ( "button" , "Press Me" , WS_OVERLAPPEDWINDOW, x*20,
                                                        x*20 , 150 , 100 , 0 , 0 , hinstance , 0 ) ;
                ShowWindow (h[x] , nCmdShow  );
Title: Re: compiling error in a windows program : CreateWindow Function
Post by: p b das on July 21, 2017, 02:37:08 pm
The code can be modified  avoiding  array as under :

 #include<windows.h>


 int _stdcall WinMain ( HINSTANCE hinstance, HINSTANCE hPrevInstance,
                                      LPSTR  lpszCmdline, int nCmdShow )
{
  HWND  h ;


     
      h = CreateWindow (" BUTTON" , "Press Me" ,
                     WS_OVERLAPPEDWINDOW ,10 ,10 ,150 , 100 , 0 , 0 , h , 0  );
       ShowWindow (h , nCmdShow ) ;
       MessageBox ( 0 , " Hi !" , "Waiting" , MB_OK ) ;
        return  0 ;

  }


This code also results into same compiling error  in Pelles C compiler .  I have tested  this code and the earlier code posted in this forum   run correctly in
 Dev-C++ .without any compiling error. I want to know if there is any problem with the Pelles C compiler . I am beginner in windows C programming
Title: Re: compiling error in a windows program : CreateWindow Function
Post by: jj2007 on July 21, 2017, 03:24:03 pm
I am beginner in windows C programming

You should learn to
a) read error messages and
b) read our posts.

And no, there is no problem with Pelles C. You do not understand the differences between HWND and HINSTANCE, and you do not have the faintest idea what a local variable is. Your code is nonsense, my dear.