74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
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#include ".\grabwnd.h"
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#include <strsafe.h>
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#define LCID_INVARIANT MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT)
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typedef struct _GRABDATA
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{
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HHOOK hook;
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HWND hwndParent;
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WCHAR szClassName[256];
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WCHAR szTitle[256];
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GRABCB callback;
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ULONG_PTR user;
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} GRABDATA;
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static GRABDATA g_grab = {0, 0, };
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static BOOL IsTargetClass(HWND hwnd, LPCWSTR plzClassName)
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{
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wchar_t szName[256] = {0};
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return (0x00 == plzClassName[0] ||
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(GetClassNameW(hwnd, szName, sizeof(szName)/sizeof(wchar_t)) &&
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CSTR_EQUAL == CompareStringW(LCID_INVARIANT, NORM_IGNORECASE, szName, -1, plzClassName, -1)));
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}
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static BOOL IsTargetTitle(HWND hwnd, LPCWSTR pszTitle)
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{
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wchar_t szName[256] = {0};
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return (0x00 == pszTitle[0] ||
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(GetWindowTextW(hwnd, szName, sizeof(szName)/sizeof(wchar_t)) &&
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CSTR_EQUAL == CompareStringW(LCID_INVARIANT, NORM_IGNORECASE, szName, -1, pszTitle, -1)));
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}
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static LRESULT CALLBACK HookProc(int code, WPARAM wParam, LPARAM lParam)
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{
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if (HCBT_CREATEWND == code && IsTargetClass((HWND)wParam, g_grab.szClassName) &&
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IsTargetTitle((HWND)wParam, g_grab.szTitle) &&
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(!g_grab.hwndParent || ((CBT_CREATEWND*)lParam)->lpcs->hwndParent == g_grab.hwndParent))
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{
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LRESULT result;
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if (g_grab.callback)
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{
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g_grab.callback((HWND)wParam, ((CBT_CREATEWND*)lParam)->lpcs, &((CBT_CREATEWND*)lParam)->hwndInsertAfter, g_grab.user);
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}
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result = CallNextHookEx(g_grab.hook, code, wParam, lParam);
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UnhookWindowsHookEx(g_grab.hook);
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ZeroMemory(&g_grab, sizeof(GRABDATA));
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return result;
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}
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return CallNextHookEx(g_grab.hook, code, wParam, lParam);
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}
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BOOL BeginGrabCreateWindow(LPCWSTR pszClassName, LPCWSTR pszTitle, HWND hwndParent, GRABCB callback, ULONG_PTR user)
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{
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if (g_grab.hook || !callback) return FALSE;
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if (pszClassName) StringCchCopyW(g_grab.szClassName, sizeof(g_grab.szClassName)/sizeof(wchar_t), pszClassName);
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else g_grab.szClassName[0] = 0x00;
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if (pszTitle) StringCchCopyW(g_grab.szTitle, sizeof(g_grab.szTitle)/sizeof(wchar_t), pszTitle);
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else g_grab.szTitle[0] = 0x00;
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g_grab.hwndParent = hwndParent;
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g_grab.callback = callback;
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g_grab.user = user;
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g_grab.hook = SetWindowsHookEx(WH_CBT, HookProc, NULL, GetCurrentThreadId());
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if (!g_grab.hook) ZeroMemory(&g_grab, sizeof(GRABDATA));
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return (NULL != g_grab.hook);
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}
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void EndGrabCreateWindow(void)
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{
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if (g_grab.hook) UnhookWindowsHookEx(g_grab.hook);
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ZeroMemory(&g_grab, sizeof(GRABDATA));
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}
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