2.1.19.5 GlobalFree

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include
9 Reference

Description

The GlobalFree function frees the specified global memory object and invalidates its handle.

Syntax

HGLOBAL GlobalFree( HGLOBAL hMem )

Parameters

hMem: [input] Handle to the global memory object.

Return

If the function succeeds, the return value is NULL.

If the function fails, the return value is equal to a handle to the global memory object.

Examples

EX1

void GlobalFree_Ex1()
{
	string strTemp = "This is a test";
	int nMemSize = strTemp.GetLength()+1 ;
	
	HANDLE hData = GlobalAlloc(GHND,nMemSize);

	if(!hData)
	{
		out_str("failed to alloc memory\n");
		return ;
	}
	
	 DWORD dSize = GlobalSize(hData);
	 if(dSize != nMemSize)
	 {
	 	out_str("memory is not enough\n");
	 	return ;
	 }
	 
	 LPSTR lpData = (LPSTR)GlobalLock(hData);    
     lstrcpyn(lpData, strTemp, nMemSize);
     GlobalUnlock(hData);
     
     out_str(lpData);
     
     if(NULL != GlobalFree(hData))
     {
     	out_str("failed to free the allocated memory\n");
     	return ;
     }
     else
     {
     	lpData = NULL; 
     	out_str("success to free the allocated memory");
     }	
}