PathFileExists用法－－使用#include <shlwapi.h>

BOOL PathFileExists(LPCTSTR pszPath);

         Determines if a file exists.

---经检测，该函数可以检测文件或目录是否存在！

Remarks

This function tests the validity of the file and path. It works only on the local file system or on a remote drive that has been mounted to a drive letter. It will return FALSE for remote file paths that begin with the UNC names \\server or \\server\share. It will also return FALSE if a mounted remote drive is out of service.

 

为了使用PathFileExists()，必须包含头文件"shlwapi.h"，范例代码如下：

#include <windows.h>
#include <iostream.h>
#include <shlwapi.h>

void main( void )
{
	// Valid file path name (file is there).
	char buffer_1[] = "C:\\TEST\\file.txt"; 
	char *lpStr1;
	lpStr1 = buffer_1;
	
	// Invalid file path name (file is not there).
	char buffer_2[] = "C:\\TEST\\file.doc"; 
	char *lpStr2;
	lpStr2 = buffer_2;
	
	
	// Search for the presence of a file with a true result.
	int retval = PathFileExists(lpStr1);
	if(retval == 1)
	{
		cout << "Search for the file path of : " << lpStr1 << endl;
		cout << "The file requested \"" << lpStr1 << "\" is a valid file" << endl;
		cout << "The return from function is: " << retval << endl;
	}
	
	else
	{
		cout << "The file requested " << lpStr1 << " is not a valid file" << endl;
		cout << "The return from function is: " << retval << endl;
	}
	
	// Search for the presence of a file with a false result.
	retval = PathFileExists(lpStr2);
	if(retval == 1)
	{
		cout << "\nThe file requested " << lpStr2 << " is a valid file" << endl;
		cout << "Search for the file path of: " << lpStr2 << endl;
		cout << "The return from function is: " << retval << endl;
	}
	
	else
	{
		cout << "\nThe file requested \"" << lpStr2 << "\" is not a valid file" << endl;
		cout << "The return from function is: " << retval << endl;
	}
}

编译后，却发现一个错误：error LNK2001: unresolved external symbol __imp__PathFileExistsA@4

网上搜索了下，发现是因为没有添加相应的lib。添加lib的方法网上有不少，这里使用下面的方法：

 

 这样，就可以通过编译了！