问题描述
我正在尝试枚举COM端口的友好名称。由于USB串行设备在运行时连接和断开,端口可能会动态更改。根据,但它是为较早版本的setupapi单元编写的(原始链接到homeepages.borland.com当然不起作用)。
我尝试使用当前JVCL中的setupapi单元(),但它似乎不兼容Delphi 7.我得到编译错误:
如果SetupDiGetDeviceRegistryProperty(DevInfoHandle,DeviceInfoData,
RegProperty,
@PropertyRegDataType,
@ S1 [1],RequiredSize, @RequiredSize)然后开始
在调用函数 SetupDiGetDeviceRegistryProperty 时,
在参数 @PropertyRegDataType 和 @RequiredSize 之间得到错误实际和形式参数的类型必须相同。
Delphi3000站点说,代码是在2004年写的,适用于Delphi 7,所以我不知道为什么它现在不适用于Delphi 7,除非setupapi已经改变。有人熟悉setupapi的更改可能会导致这些问题吗?
我正在使用简单的控制台程序进行测试。用法语句是windows,
sysutils,
类,
setupAPI,
Registry;
主程序是:
begin
ComPortStringList:= SetupEnumAvailableComPorts;
for Index:= 0 to ComPortStringList.Count - 1 do
writeln(ComPortStringList [Index]);
结束
结束。
看起来像一些参数类型 SetupApi.pas 中替换为 var DWord
的PDWord 。所有你需要的是从你的代码中的这些参数中删除'@':
如果SetupDiGetDeviceRegistryProperty(DevInfoHandle,DeviceInfoData,
RegProperty,
PropertyRegDataType,
@ S1 [1],RequiredSize,RequiredSize)然后开始
I'm trying to enumerate "friendly names" for COM ports. The ports may dynamically change as USB-serial devices are connected and disconnected at runtime.
Based on the possible methods described in this question, I am attempting to use the SetupDiGetClassDevs method.
I found this example code, but it is written for an older version of the setupapi unit (the original link to homepages.borland.com doesn't work of course).
I tried using the setupapi unit from the current JVCL(JVCL340CompleteJCL221-Build3845), but it doesn't seem to be compatible with Delphi 7. I get compiler errors:
if SetupDiGetDeviceRegistryProperty(DevInfoHandle,DeviceInfoData,
RegProperty,
@PropertyRegDataType,
@S1[1],RequiredSize,@RequiredSize) then begin
In the call to function SetupDiGetDeviceRegistryProperty,I get the error "Types of actual and formal parameters must be identical" on the parameters @PropertyRegDataType, and @RequiredSize.
The Delphi3000 site says the code was written in 2004 and is intended for Delphi 7, so I'm not sure why it doesn't work with Delphi 7 now, unless setupapi has changed. Is anyone familiar with the changes to setupapi that could cause these problems?
I'm testing with a simple console program. The uses statement is " windows, sysutils, classes, setupAPI, Registry;"
The main program is:
begin
ComPortStringList := SetupEnumAvailableComPorts;
for Index := 0 to ComPortStringList.Count - 1 do
writeln(ComPortStringList[Index]);
end;
end.
Looks like some arguments of type PDWord
were replaced by var DWord
in SetupApi.pas
. All you need is to remove '@' from these arguments in your code like that:
if SetupDiGetDeviceRegistryProperty(DevInfoHandle,DeviceInfoData,
RegProperty,
PropertyRegDataType,
@S1[1],RequiredSize,RequiredSize) then begin
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