Thread: 'initializing' : cannot convert from 'void *' to 'int *'

Hello, I can someone tell me why I get this error? I tried to run a source code for the WINAPI for a program tutoriol, the one I posted in another post. it gives me the error in the title. What could it be? "cannot convert from void * to INT*"?

The source code for the tutoriol works when I downloaded it. so I don't know why it does that.

If you are using a c++ compiler that error usually means you have to typecast the return value of a function that is returning void*. But can't be certain because we can't see your code and I'm not going to hunt all over this board to try and find the code you previously posted.

Code:

case IDC_REMOVE:
				{
					// When the user clicks the Remove button, we first get the number
					// of selected items

					HWND hList = GetDlgItem(hwnd, IDC_LIST);
					int count = SendMessage(hList, LB_GETSELCOUNT, 0, 0);
					if(count != LB_ERR)
					{
						if(count != 0)
						{
							// And then allocate room to store the list of selected items.

							int i;
							int *buf = GlobalAlloc(GPTR, sizeof(int) * count);
							SendMessage(hList, LB_GETSELITEMS, (WPARAM)count, (LPARAM)buf);
							
							// Now we loop through the list and remove each item that was
							// selected.  

							// WARNING!!!  
							// We loop backwards, because if we removed items
							// from top to bottom, it would change the indexes of the other
							// items!!!

							for(i = count - 1; i >= 0; i--)
							{
								SendMessage(hList, LB_DELETESTRING, (WPARAM)buf[i], 0);
							}

							GlobalFree(buf);
						}
						else 
						{
							MessageBox(hwnd, "No items selected.", "Warning", MB_OK);
						}
					}
					else
					{
						MessageBox(hwnd, "Error counting items :(", "Warning", MB_OK);
					}
				}

I hope it's not too confusing as I don't really know how to post the coder and in what way you want it. Thanks for ur help

Code:

int *buf = GlobalAlloc(GPTR, sizeof(int) * count);

That is valid in C but not C++. In C++, you would need to cast the GlobalAlloc return as an int* like:

Code:

int *buf = (int*) GlobalAlloc(GPTR, sizeof(int) * count);

However if no C++ dependent things reside in the code, I would simply make it a C project.

thanks, it worked. Now i have another problem:

Code:

	case WM_CREATE:
		{
			HFONT hfDefault;
			HWND hEdit;

			hEdit = CreateWindowEx(WS_EX_CLIENTEDGE, "EDIT", "", 
				WS_CHILD | WS_VISIBLE | WS_VSCROLL | WS_HSCROLL | ES_MULTILINE | ES_AUTOVSCROLL | ES_AUTOHSCROLL, 
				0, 0, 100, 100, hwnd, (HMENU)IDC_MAIN_EDIT, GetModuleHandle(NULL), NULL);
			if(hEdit == NULL)
				MessageBox(hwnd, "Could not create edit box.", "Error", MB_OK | MB_ICONERROR);

			hfDefault = GetStockObject(DEFAULT_GUI_FONT);
			SendMessage(hEdit, WM_SETFONT, (WPARAM)hfDefault, MAKELPARAM(FALSE, 0));
		}
		break;

'=' : cannot convert from 'void *' to 'struct HFONT__ *'
Conversion from 'void*' to pointer to non-'void' requires an explicit cast

That's from another tutoriol, would i do something diffrent? or the same thing?

Hmmmmm, the controls program compiled fine but wont open for some reason. This is strange. No idea why it wont open