C++ 获取桌面(Desktop)选中项-白红宇

代码思路来源于开源项目 ,并做了简化.

开始

在VS2017 下创建C++控制台项目,在预编译头文件添加适当的include

#ifndef PCH_H#define PCH_H// TODO: 添加要在此处预编译的标头#include
    
     #include
     
      #include
      
       #include
       
        #include
        
         #include
         
          #include
          
           #include
           
            #include
            
             #endif //PCH_H// 以上为QuickLook所添加的头文件.复制代码

创建函数定义

void GetSelectedInternernal(CComQIPtr
    
      pwba);void ObtainFirstItem(CComPtr
     
       dao);void getSelectedFromDesktop();复制代码

main 函数

int main(){	for (;;)	{		getSelectedFromDesktop();		Sleep(1000);	}}// 考虑到测试用途直接来个无限循环+Sleep复制代码

getSelectedFromDesktop

void getSelectedFromDesktop() {    // 初始化	CoInitialize(nullptr);	CComPtr
    
      psw;	CComQIPtr
     
       pwba;	// 获取 IShellWindows 实例	if (FAILED(psw.CoCreateInstance(CLSID_ShellWindows)))		return;	VARIANT pvarLoc;	VariantInit(&pvarLoc);	long phwnd;	// 获取 IWebBrowserApp 实例	if (FAILED(psw->FindWindowSW(&pvarLoc, &pvarLoc, SWC_DESKTOP, &phwnd, SWFO_NEEDDISPATCH, reinterpret_cast
      
       (		&pwba))))		return;	GetSelectedInternernal(pwba);}复制代码

GetSelectedInternernal

// 层层递进取得最终的IShellView,并取出选中项(SVGIO_SELECTION)void GetSelectedInternernal(CComQIPtr
    
      pwba) {	CComQIPtr
     
       psp;	if (FAILED(pwba->QueryInterface(IID_IServiceProvider, reinterpret_cast
      
       (&psp)))) {		return;	}	CComPtr
       
         psb;	if (FAILED(psp->QueryService(SID_STopLevelBrowser, IID_IShellBrowser, reinterpret_cast
        
         (&psb)))) {		return;	}	CComPtr
         
           psv; if (FAILED(psb->QueryActiveShellView(&psv))) { return; } CComPtr
          
            dao; if (FAILED(psv->GetItemObject(SVGIO_SELECTION, IID_IDataObject, reinterpret_cast
           
            (&dao)))) { return; } ObtainFirstItem(dao);}复制代码

// 最终提取文件地址void ObtainFirstItem(CComPtr
    
      dao) {	FORMATETC formatetc;	STGMEDIUM medium = { sizeof medium };	formatetc.cfFormat = CF_HDROP;	formatetc.ptd = nullptr;	formatetc.dwAspect = DVASPECT_CONTENT;	formatetc.lindex = -1;	formatetc.tymed = TYMED_HGLOBAL;	medium.tymed = TYMED_HGLOBAL;	if (FAILED(dao->GetData(&formatetc, &medium)))		return;        // 获取选中数量	int n = DragQueryFile(HDROP(medium.hGlobal), 0xFFFFFFFF, nullptr, 0);	if (n < 1)		return;	WCHAR buffer[260] = { '\0' };        // 选择第一个	DragQueryFile(HDROP(medium.hGlobal), 0, buffer, MAX_PATH - 1);	// 输出	std::wcout << buffer << std::endl;}复制代码