通过SetForegroundWindow移到前台的窗口并没有输入焦点，怎样才能真正激活

[GameWeaverDummy]

我发现通过上面那个函数移到前台的窗口不是真正激活的（标题栏灰色的），且该窗口没有输入焦点，请问怎样才能让后台的进程移到前台且拥有输入焦点？

[GameWeaverDummy]

up

[jerry]

The SetForegroundWindow function puts the thread that created the specified window into the foreground and activates the window. Keyboard input is directed to the window, and various visual cues are changed for the user. The system assigns a slightly higher priority to the thread that created the foreground window than it does to other threads.

根据这段函数说明, 应该是有的,可能你当时在做什么,就焦点又跑掉了

[GameWeaverDummy]

大家帮我看看这段代码好吗？
BOOL CALLBACK MyEnumWindowsProc( HWND hwnd, LPARAM lParam )
{
DWORD dwID ;
GetWindowThreadProcessId(hwnd, &dwID);
if(dwID == (DWORD)lParam)
{
::SetForegroundWindow((HWND)hwnd);
}

return TRUE ;
}

void CXX::OnLbnDblclkListGet()
{
。。。。。。
EnumWindows((WNDENUMPROC)MyEnumWindowsProc, (LPARAM)dwID);
}

我调试时发现::SetForegroundWindow((HWND)hwnd);这一句执行了好几次。为什么会这样？
我想让它只执行一次，怎么办？

[vcmute]

BOOL CALLBACK MyEnumWindowsProc( HWND hwnd, LPARAM lParam )
{
DWORD dwID ;
GetWindowThreadProcessId(hwnd, &dwID);
if(dwID == (DWORD)lParam)
{
::SetForegroundWindow((HWND)hwnd);
return FALSE ;
}

return TRUE ;
}

[GameWeaverDummy]

添加return FALSE ;后，
::SetForegroundWindow((HWND)hwnd);这一句不起作用了：后台运行的进程没有显示到前台来
不信你自己试试看

[GameWeaverDummy]

up

[GameWeaverDummy]

csdn没救了
这么久才几个人回复

[horisly]

我调试时发现::SetForegroundWindow((HWND)hwnd);这一句执行了好几次。为什么会这样？
我想让它只执行一次，怎么办？

＝＝＝》》
如果EnumWindowsProc返回TRUE的话，它会继续枚举的，返回FALSE的话就停止枚举。
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
添加return FALSE ;后，
::SetForegroundWindow((HWND)hwnd);这一句不起作用了：后台运行的进程没有显示到前台来
====>>
可以啊，我试过行的

[horisly]

这是我得测试程序：

#include<windows.h>

HINSTANCE hInst;
LRESULT CALLBACK WndProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam);
BOOL CALLBACK MyEnumWindowsProc( HWND hwnd, LPARAM lParam );

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd){
static TCHAR strApp[] = "WIN32";
static TCHAR strCaption[] = "WIN32 Programer";
MSG msg;
WNDCLASS wc;
wc.style = CS_HREDRAW | CS_VREDRAW ;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.hCursor = LoadCursor(NULL,IDC_ARROW);
wc.hIcon = LoadIcon(NULL,IDI_APPLICATION);
wc.lpszClassName = strApp;
wc.lpszMenuName = NULL;

if(!RegisterClass(&wc))
return FALSE;
HWND hWnd = CreateWindow(strApp,strCaption,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT
,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);
if(!hWnd)
return FALSE;
hInst = hInstance;
ShowWindow(hWnd,nShowCmd);
UpdateWindow(hWnd);

while(GetMessage(&msg,NULL,0,0)){
TranslateMessage(&msg); //WM_KEYDOWN , WM_KEYUP 被翻译为 WM_CHAR
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam){
static HWND HbtWnd;
DWORD dwID ;
switch(uMsg){
case WM_CREATE:
HbtWnd = CreateWindow(TEXT("button"),"EnumWindow",WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,0,0,100,30,hWnd,NULL,hInst,NULL);
return 0;
case WM_COMMAND:
if((HWND)lParam == HbtWnd){
GetWindowThreadProcessId(hWnd, &dwID);
EnumWindows((WNDENUMPROC)MyEnumWindowsProc, (LPARAM)dwID);
return 0;
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
}
return DefWindowProc(hWnd,uMsg,wParam,lParam);
}


BOOL CALLBACK MyEnumWindowsProc( HWND hwnd, LPARAM lParam )
{
DWORD dwID ;
GetWindowThreadProcessId(hwnd, &dwID);
if(dwID == (DWORD)lParam)
{
MessageBox(NULL,"SetForegroundWindow","TIPS",MB_OK);
ShowWindow(hwnd,SW_HIDE);
Sleep(5000);
ShowWindow(hwnd,SW_SHOWNOACTIVATE);
::SetForegroundWindow((HWND)hwnd);
return FALSE;
}

return TRUE ;
}

[horisly]

你点击按钮后，窗口就会隐藏ShowWindow(hwnd,SW_HIDE); 然后Sleep 5秒。再以不激活形式showwindow ==>ShowWindow(hwnd,SW_SHOWNOACTIVATE);然后通过 ::SetForegroundWindow((HWND)hwnd); 激活窗口

[UDX协议]

HWND hwndForeground = GetForegroundWindow();
if(hwndForeground )
{
DWORD dwThreadIdAttachTo = GetWindowThreadProcessId(hwndForeground, NULL);
DWORD dwThreadIdAttachToB = GetWindowThreadProcessId(g_hMainWnd, NULL);
if(dwThreadIdAttachTo != dwThreadIdAttachToB)
{
AttachThreadInput(dwThreadIdAttachToB, dwThreadIdAttachTo, TRUE);
BringWindowToTop(g_hMainWnd);
SetForegroundWindow(g_hMainWnd);
SetActiveWindow(g_hMainWnd);
GetWindowThreadProcessId(g_hMainWnd, NULL);

AttachThreadInput(dwThreadIdAttachToB, dwThreadIdAttachTo, FALSE);
}
}
当前输入焦点是区分进程的。setforwindow只对当前进程有效。

[UDX协议]

怎么乱成这样了。晕

[anlywei]

学习