140 lines
2.8 KiB
C++
140 lines
2.8 KiB
C++
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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BaanIV.cpp
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Abstract:
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Ignore WM_STYLECHANGED on the app's subclassed listbox. This is needed
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because the app subclasses the listbox and Win2k changed a bit the
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behavior of the listbox window proc with regards to handling
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WM_STYLECHANGED.
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Notes:
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This is an app specific shim.
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History:
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02/16/2000 clupu Created
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--*/
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#include "precomp.h"
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#include <commdlg.h>
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IMPLEMENT_SHIM_BEGIN(BaanIV)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(SetWindowLongA)
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APIHOOK_ENUM_ENTRY(CallWindowProcA)
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APIHOOK_ENUM_END
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WNDPROC gpfnOrgListBoxWndProc;
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WNDPROC gpfnAppListBoxWndProc;
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/*++
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Ignore WM_STYLECHANGED.
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--*/
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LRESULT
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Modified_ListBoxWndProcA(
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HWND hwnd,
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UINT message,
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WPARAM wParam,
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LPARAM lParam
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)
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{
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if (message == WM_STYLECHANGED) {
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return 0;
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}
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return (*gpfnAppListBoxWndProc)(hwnd, message, wParam, lParam);
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}
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/*++
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When the app calls CallWindowProc passing our modified listbox
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proc call the original window proc instead
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--*/
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LRESULT
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APIHOOK(CallWindowProcA)(
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WNDPROC pfn,
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HWND hwnd,
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UINT message,
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WPARAM wParam,
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LPARAM lParam)
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{
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if (pfn == Modified_ListBoxWndProcA) {
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pfn = gpfnOrgListBoxWndProc;
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}
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return ORIGINAL_API(CallWindowProcA)(pfn, hwnd, message, wParam, lParam);
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}
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/*++
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When the app subclasses the listbox of a combobox grab the original listbox
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proc, grab the pointer that the app is trying to set, set the new pointer to
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be our modified version of the listbox proc and return to the app our pointer.
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--*/
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ULONG_PTR
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APIHOOK(SetWindowLongA)(
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HWND hwnd,
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int nIndex,
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ULONG_PTR newLong
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)
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{
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if (nIndex == GWLP_WNDPROC) {
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WNDCLASSA wndClass;
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WNDPROC pfnOrg;
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GetClassInfoA((HINSTANCE)GetWindowLong(hwnd, GWLP_HINSTANCE),
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"ComboLBox",
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&wndClass);
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pfnOrg = (WNDPROC)GetWindowLong(hwnd, GWLP_WNDPROC);
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if (pfnOrg == wndClass.lpfnWndProc) {
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gpfnOrgListBoxWndProc = pfnOrg;
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DPFN( eDbgLevelInfo, "Fix up subclassing of ComboLBox");
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gpfnAppListBoxWndProc = (WNDPROC)newLong;
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newLong = (ULONG_PTR)Modified_ListBoxWndProcA;
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ORIGINAL_API(SetWindowLongA)(hwnd, nIndex, newLong);
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return newLong;
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}
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}
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// Call the Initial function
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return ORIGINAL_API(SetWindowLongA)(hwnd, nIndex, newLong);
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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APIHOOK_ENTRY(USER32.DLL, SetWindowLongA)
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APIHOOK_ENTRY(USER32.DLL, CallWindowProcA)
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HOOK_END
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IMPLEMENT_SHIM_END
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