Thread: Coordinates of cursor

Have no idea why does this code return an erroe. In another project the same function OnWM_MOUSEMOVE() works with no errors...

Code:

#include <windows.h>
#include "resource1.h"

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
    HWND hWnd;

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                   PSTR szCmdLine, int iCmdShow)
{
    TCHAR szAppName[] = TEXT("Default window");           // Header
    MSG msg;
    WNDCLASSEX wc;
    
    wc.cbSize = sizeof(wc);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_ICON));            // Ico
    wc.hIconSm = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_ICON));          // Ico_sm
    wc.hCursor = (HCURSOR)LoadCursor(hInstance, MAKEINTRESOURCE(IDC_CURSOR));
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+0);           // Background
    wc.lpszMenuName = NULL;
    wc.lpszClassName = szAppName;
    
    RegisterClassEx(&wc);
    
    hWnd = CreateWindowEx(0,szAppName,
                        szAppName,
                        WS_OVERLAPPEDWINDOW,
                        CW_USEDEFAULT,                    // Margin from left
                        CW_USEDEFAULT,                    // Margin from top
                        CW_USEDEFAULT,                    // Widht
                        CW_USEDEFAULT,                    // Height
                        NULL,
                        NULL,
                        hInstance,NULL);
    ShowWindow(hWnd, iCmdShow);
    UpdateWindow(hWnd);
    
    while(GetMessage(&msg, NULL, 0, 0))
    {
          TranslateMessage(&msg);
          DispatchMessage(&msg);
    }
    return msg.wParam;
}

void OnWM_MOUSEMOVE(WPARAM wParam, LPARAM lParam)
{
	POINTS ptCursor;
	TCHAR chText[30];
	ptCursor = MAKEPOINTS(lParam);
	_stprintf(chText, "x=%d, y=%d", ptCursor.x, ptCursor.y);
	SetWindowText(hWnd, chText);
}

void Draw(HWND hWnd)
{
  HDC   hDC;
  hDC = GetDC(hWnd);
  DrawIcon(hDC, 50, 50,
    (HICON)(WORD)GetClassLong(hWnd, GCL_HICON));
  ReleaseDC(hWnd, hDC); 
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
        switch(message)
        {
          case WM_DESTROY:
          PostQuitMessage(0);
          return 0;

		  case WM_PAINT:
			  Draw(hWnd);
			  break;

		  case WM_MOUSEMOVE:
			  OnWM_MOUSEMOVE(wParam, lParam);
			  break;
        }
        return DefWindowProc(hWnd, message, wParam, lParam);
}

error C2664: '_swprintf' : cannot convert parameter 2 from 'const char [11]' to 'const wchar_t *'


MS Visual C++
Thx for support

you are working in unicode. Change that and it should work.

Originally Posted by vrek

you are working in unicode. Change that and it should work.

I am supposed to know it but how do I change it?

Depends on your compiler as to the exact placement of the option. Just look around the options and you should see something like "Use UniCode: TRUE" or something to that effect.