使用 JNA (Java) 进行 Windows 缩略图预览
W32API.HWND targetHwnd = User32.INSTANCE.FindWindow("SunAwtFrame", "Frame")
W32API.HWND sourceHwnd = User32.INSTANCE.FindWindow("triuiScreen", "EVE")
W32API.HANDLE thumbnailH = new W32API.HANDLE()
NativeLibrary dwm = NativeLibrary.getInstance("dwmapi")
dwm.getFunction('DwmRegisterThumbnail').invoke(targetHwnd, sourceHwnd, thumbnailH)
让我
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x70f34bee, pid=7208, tid=7364
#
# JRE version: 6.0_18-b07
# Java VM: Java HotSpot(TM) Client VM (16.0-b13 mixed mode, sharing windows-x86 )
# Problematic frame:
# C [DWMAPI.DLL+0x4bee]
有一种感觉，我做得完全错误，但深入文档却一无所获。
W32API.HWND targetHwnd = User32.INSTANCE.FindWindow("SunAwtFrame", "Frame")
W32API.HWND sourceHwnd = User32.INSTANCE.FindWindow("triuiScreen", "EVE")
W32API.HANDLE thumbnailH = new W32API.HANDLE()
NativeLibrary dwm = NativeLibrary.getInstance("dwmapi")
dwm.getFunction('DwmRegisterThumbnail').invoke(targetHwnd, sourceHwnd, thumbnailH)
gives me
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x70f34bee, pid=7208, tid=7364
#
# JRE version: 6.0_18-b07
# Java VM: Java HotSpot(TM) Client VM (16.0-b13 mixed mode, sharing windows-x86 )
# Problematic frame:
# C [DWMAPI.DLL+0x4bee]
I have a feeling I'm doing it completely wrong, but digging in documentation got me nowhere.
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第三个参数是“out”参数，并且需要是指向句柄的指针，而不是句柄本身。所以，像
The 3rd param is an "out" parameter, and needs to be a pointer to the handle, not the handle itself. So, something like